@@ -2,9 +2,7 @@ include $(GOROOT)/src/Make.inc
 
 TARG=github.com/russross/blackfriday
 
-GOFILES=markdown.go html.go smartypants.go
-
-package:
+GOFILES=markdown.go block.go inline.go html.go smartypants.go
 
 include $(GOROOT)/src/Make.pkg
 

@@ -0,0 +1,1029 @@
+//
+// Black Friday Markdown Processor
+// Originally based on http://github.com/tanoku/upskirt
+// by Russ Ross <russ@russross.com>
+//
+
+//
+// Functions to parse block-level elements.
+//
+
+package blackfriday
+
+import (
+	"bytes"
+)
+
+// parse block-level data
+func parseBlock(out *bytes.Buffer, rndr *render, data []byte) {
+	if rndr.nesting >= rndr.maxNesting {
+		return
+	}
+	rndr.nesting++
+
+	for len(data) > 0 {
+		if isPrefixHeader(rndr, data) {
+			data = data[blockPrefixHeader(out, rndr, data):]
+			continue
+		}
+		if data[0] == '<' && rndr.mk.blockhtml != nil {
+			if i := blockHtml(out, rndr, data, true); i > 0 {
+				data = data[i:]
+				continue
+			}
+		}
+		if i := isEmpty(data); i > 0 {
+			data = data[i:]
+			continue
+		}
+		if isHrule(data) {
+			if rndr.mk.hrule != nil {
+				rndr.mk.hrule(out, rndr.mk.opaque)
+			}
+			var i int
+			for i = 0; i < len(data) && data[i] != '\n'; i++ {
+			}
+			data = data[i:]
+			continue
+		}
+		if rndr.flags&EXTENSION_FENCED_CODE != 0 {
+			if i := blockFencedCode(out, rndr, data); i > 0 {
+				data = data[i:]
+				continue
+			}
+		}
+		if rndr.flags&EXTENSION_TABLES != 0 {
+			if i := blockTable(out, rndr, data); i > 0 {
+				data = data[i:]
+				continue
+			}
+		}
+		if blockQuotePrefix(data) > 0 {
+			data = data[blockQuote(out, rndr, data):]
+			continue
+		}
+		if blockCodePrefix(data) > 0 {
+			data = data[blockCode(out, rndr, data):]
+			continue
+		}
+		if blockUliPrefix(data) > 0 {
+			data = data[blockList(out, rndr, data, 0):]
+			continue
+		}
+		if blockOliPrefix(data) > 0 {
+			data = data[blockList(out, rndr, data, LIST_TYPE_ORDERED):]
+			continue
+		}
+
+		data = data[blockParagraph(out, rndr, data):]
+	}
+
+	rndr.nesting--
+}
+
+func isPrefixHeader(rndr *render, data []byte) bool {
+	if data[0] != '#' {
+		return false
+	}
+
+	if rndr.flags&EXTENSION_SPACE_HEADERS != 0 {
+		level := 0
+		for level < len(data) && level < 6 && data[level] == '#' {
+			level++
+		}
+		if level < len(data) && data[level] != ' ' && data[level] != '\t' {
+			return false
+		}
+	}
+	return true
+}
+
+func blockPrefixHeader(out *bytes.Buffer, rndr *render, data []byte) int {
+	level := 0
+	for level < len(data) && level < 6 && data[level] == '#' {
+		level++
+	}
+	i, end := 0, 0
+	for i = level; i < len(data) && (data[i] == ' ' || data[i] == '\t'); i++ {
+	}
+	for end = i; end < len(data) && data[end] != '\n'; end++ {
+	}
+	skip := end
+	for end > 0 && data[end-1] == '#' {
+		end--
+	}
+	for end > 0 && (data[end-1] == ' ' || data[end-1] == '\t') {
+		end--
+	}
+	if end > i {
+		work := bytes.NewBuffer(nil)
+		parseInline(work, rndr, data[i:end])
+		if rndr.mk.header != nil {
+			rndr.mk.header(out, work.Bytes(), level, rndr.mk.opaque)
+		}
+	}
+	return skip
+}
+
+func isUnderlinedHeader(data []byte) int {
+	i := 0
+
+	// test of level 1 header
+	if data[i] == '=' {
+		for i = 1; i < len(data) && data[i] == '='; i++ {
+		}
+		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+		if i >= len(data) || data[i] == '\n' {
+			return 1
+		} else {
+			return 0
+		}
+	}
+
+	// test of level 2 header
+	if data[i] == '-' {
+		for i = 1; i < len(data) && data[i] == '-'; i++ {
+		}
+		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+		if i >= len(data) || data[i] == '\n' {
+			return 2
+		} else {
+			return 0
+		}
+	}
+
+	return 0
+}
+
+func blockHtml(out *bytes.Buffer, rndr *render, data []byte, do_render bool) int {
+	var i, j int
+
+	// identify the opening tag
+	if len(data) < 2 || data[0] != '<' {
+		return 0
+	}
+	curtag, tagfound := blockHtmlFindTag(data[1:])
+
+	// handle special cases
+	if !tagfound {
+
+		// HTML comment, laxist form
+		if len(data) > 5 && data[1] == '!' && data[2] == '-' && data[3] == '-' {
+			i = 5
+
+			for i < len(data) && !(data[i-2] == '-' && data[i-1] == '-' && data[i] == '>') {
+				i++
+			}
+			i++
+
+			if i < len(data) {
+				j = isEmpty(data[i:])
+			}
+
+			if j > 0 {
+				size := i + j
+				if do_render && rndr.mk.blockhtml != nil {
+					rndr.mk.blockhtml(out, data[:size], rndr.mk.opaque)
+				}
+				return size
+			}
+		}
+
+		// HR, which is the only self-closing block tag considered
+		if len(data) > 4 && (data[1] == 'h' || data[1] == 'H') && (data[2] == 'r' || data[2] == 'R') {
+			i = 3
+			for i < len(data) && data[i] != '>' {
+				i++
+			}
+
+			if i+1 < len(data) {
+				i++
+				j = isEmpty(data[i:])
+				if j > 0 {
+					size := i + j
+					if do_render && rndr.mk.blockhtml != nil {
+						rndr.mk.blockhtml(out, data[:size], rndr.mk.opaque)
+					}
+					return size
+				}
+			}
+		}
+
+		// no special case recognized
+		return 0
+	}
+
+	// look for an unindented matching closing tag
+	//      followed by a blank line
+	i = 1
+	found := false
+
+	// if not found, try a second pass looking for indented match
+	// but not if tag is "ins" or "del" (following original Markdown.pl)
+	if curtag != "ins" && curtag != "del" {
+		i = 1
+		for i < len(data) {
+			i++
+			for i < len(data) && !(data[i-1] == '<' && data[i] == '/') {
+				i++
+			}
+
+			if i+2+len(curtag) >= len(data) {
+				break
+			}
+
+			j = blockHtmlFindEnd(curtag, rndr, data[i-1:])
+
+			if j > 0 {
+				i += j - 1
+				found = true
+				break
+			}
+		}
+	}
+
+	if !found {
+		return 0
+	}
+
+	// the end of the block has been found
+	if do_render && rndr.mk.blockhtml != nil {
+		rndr.mk.blockhtml(out, data[:i], rndr.mk.opaque)
+	}
+
+	return i
+}
+
+func blockHtmlFindTag(data []byte) (string, bool) {
+	i := 0
+	for i < len(data) && ((data[i] >= '0' && data[i] <= '9') || (data[i] >= 'A' && data[i] <= 'Z') || (data[i] >= 'a' && data[i] <= 'z')) {
+		i++
+	}
+	if i >= len(data) {
+		return "", false
+	}
+	key := string(data[:i])
+	if block_tags[key] {
+		return key, true
+	}
+	return "", false
+}
+
+func blockHtmlFindEnd(tag string, rndr *render, data []byte) int {
+	// assume data[0] == '<' && data[1] == '/' already tested
+
+	// check if tag is a match
+	if len(tag)+3 >= len(data) || bytes.Compare(data[2:2+len(tag)], []byte(tag)) != 0 || data[len(tag)+2] != '>' {
+		return 0
+	}
+
+	// check white lines
+	i := len(tag) + 3
+	w := 0
+	if i < len(data) {
+		if w = isEmpty(data[i:]); w == 0 {
+			return 0 // non-blank after tag
+		}
+	}
+	i += w
+	w = 0
+
+	if rndr.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
+		if i < len(data) {
+			w = isEmpty(data[i:])
+		}
+	} else {
+		if i < len(data) {
+			if w = isEmpty(data[i:]); w == 0 {
+				return 0 // non-blank line after tag line
+			}
+		}
+	}
+
+	return i + w
+}
+
+func isEmpty(data []byte) int {
+	var i int
+	for i = 0; i < len(data) && data[i] != '\n'; i++ {
+		if data[i] != ' ' && data[i] != '\t' {
+			return 0
+		}
+	}
+	return i + 1
+}
+
+func isHrule(data []byte) bool {
+	// skip initial spaces
+	if len(data) < 3 {
+		return false
+	}
+	i := 0
+	if data[0] == ' ' {
+		i++
+		if data[1] == ' ' {
+			i++
+			if data[2] == ' ' {
+				i++
+			}
+		}
+	}
+
+	// look at the hrule char
+	if i+2 >= len(data) || (data[i] != '*' && data[i] != '-' && data[i] != '_') {
+		return false
+	}
+	c := data[i]
+
+	// the whole line must be the char or whitespace
+	n := 0
+	for i < len(data) && data[i] != '\n' {
+		switch {
+		case data[i] == c:
+			n++
+		case data[i] != ' ' && data[i] != '\t':
+			return false
+		}
+		i++
+	}
+
+	return n >= 3
+}
+
+func isFencedCode(data []byte, syntax **string) int {
+	i, n := 0, 0
+
+	// skip initial spaces
+	if len(data) < 3 {
+		return 0
+	}
+	if data[0] == ' ' {
+		i++
+		if data[1] == ' ' {
+			i++
+			if data[2] == ' ' {
+				i++
+			}
+		}
+	}
+
+	// look at the hrule char
+	if i+2 >= len(data) || !(data[i] == '~' || data[i] == '`') {
+		return 0
+	}
+
+	c := data[i]
+
+	// the whole line must be the char or whitespace
+	for i < len(data) && data[i] == c {
+		n++
+		i++
+	}
+
+	if n < 3 {
+		return 0
+	}
+
+	if syntax != nil {
+		syn := 0
+
+		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+
+		syntax_start := i
+
+		if i < len(data) && data[i] == '{' {
+			i++
+			syntax_start++
+
+			for i < len(data) && data[i] != '}' && data[i] != '\n' {
+				syn++
+				i++
+			}
+
+			if i == len(data) || data[i] != '}' {
+				return 0
+			}
+
+			// string all whitespace at the beginning and the end
+			// of the {} block
+			for syn > 0 && isspace(data[syntax_start]) {
+				syntax_start++
+				syn--
+			}
+
+			for syn > 0 && isspace(data[syntax_start+syn-1]) {
+				syn--
+			}
+
+			i++
+		} else {
+			for i < len(data) && !isspace(data[i]) {
+				syn++
+				i++
+			}
+		}
+
+		language := string(data[syntax_start : syntax_start+syn])
+		*syntax = &language
+	}
+
+	for i < len(data) && data[i] != '\n' {
+		if !isspace(data[i]) {
+			return 0
+		}
+		i++
+	}
+
+	return i + 1
+}
+
+func blockFencedCode(out *bytes.Buffer, rndr *render, data []byte) int {
+	var lang *string
+	beg := isFencedCode(data, &lang)
+	if beg == 0 {
+		return 0
+	}
+
+	work := bytes.NewBuffer(nil)
+
+	for beg < len(data) {
+		fence_end := isFencedCode(data[beg:], nil)
+		if fence_end != 0 {
+			beg += fence_end
+			break
+		}
+
+		var end int
+		for end = beg + 1; end < len(data) && data[end-1] != '\n'; end++ {
+		}
+
+		if beg < end {
+			// verbatim copy to the working buffer, escaping entities
+			if isEmpty(data[beg:]) > 0 {
+				work.WriteByte('\n')
+			} else {
+				work.Write(data[beg:end])
+			}
+		}
+		beg = end
+	}
+
+	if work.Len() > 0 && work.Bytes()[work.Len()-1] != '\n' {
+		work.WriteByte('\n')
+	}
+
+	if rndr.mk.blockcode != nil {
+		syntax := ""
+		if lang != nil {
+			syntax = *lang
+		}
+
+		rndr.mk.blockcode(out, work.Bytes(), syntax, rndr.mk.opaque)
+	}
+
+	return beg
+}
+
+func blockTable(out *bytes.Buffer, rndr *render, data []byte) int {
+	header_work := bytes.NewBuffer(nil)
+	i, columns, col_data := blockTableHeader(header_work, rndr, data)
+	if i > 0 {
+		body_work := bytes.NewBuffer(nil)
+
+		for i < len(data) {
+			pipes, row_start := 0, i
+			for ; i < len(data) && data[i] != '\n'; i++ {
+				if data[i] == '|' {
+					pipes++
+				}
+			}
+
+			if pipes == 0 || i == len(data) {
+				i = row_start
+				break
+			}
+
+			blockTableRow(body_work, rndr, data[row_start:i], columns, col_data)
+			i++
+		}
+
+		if rndr.mk.table != nil {
+			rndr.mk.table(out, header_work.Bytes(), body_work.Bytes(), rndr.mk.opaque)
+		}
+	}
+
+	return i
+}
+
+func blockTableHeader(out *bytes.Buffer, rndr *render, data []byte) (size int, columns int, column_data []int) {
+	i, pipes := 0, 0
+	column_data = []int{}
+	for i = 0; i < len(data) && data[i] != '\n'; i++ {
+		if data[i] == '|' {
+			pipes++
+		}
+	}
+
+	if i == len(data) || pipes == 0 {
+		return 0, 0, column_data
+	}
+
+	header_end := i
+
+	if data[0] == '|' {
+		pipes--
+	}
+
+	if i > 2 && data[i-1] == '|' {
+		pipes--
+	}
+
+	columns = pipes + 1
+	column_data = make([]int, columns)
+
+	// parse the header underline
+	i++
+	if i < len(data) && data[i] == '|' {
+		i++
+	}
+
+	under_end := i
+	for under_end < len(data) && data[under_end] != '\n' {
+		under_end++
+	}
+
+	col := 0
+	for ; col < columns && i < under_end; col++ {
+		dashes := 0
+
+		for i < under_end && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+
+		if data[i] == ':' {
+			i++
+			column_data[col] |= TABLE_ALIGNMENT_LEFT
+			dashes++
+		}
+
+		for i < under_end && data[i] == '-' {
+			i++
+			dashes++
+		}
+
+		if i < under_end && data[i] == ':' {
+			i++
+			column_data[col] |= TABLE_ALIGNMENT_RIGHT
+			dashes++
+		}
+
+		for i < under_end && (data[i] == ' ' || data[i] == '\t') {
+			i++
+		}
+
+		if i < under_end && data[i] != '|' {
+			break
+		}
+
+		if dashes < 3 {
+			break
+		}
+
+		i++
+	}
+
+	if col < columns {
+		return 0, 0, column_data
+	}
+
+	blockTableRow(out, rndr, data[:header_end], columns, column_data)
+	size = under_end + 1
+	return
+}
+
+func blockTableRow(out *bytes.Buffer, rndr *render, data []byte, columns int, col_data []int) {
+	i, col := 0, 0
+	row_work := bytes.NewBuffer(nil)
+
+	if i < len(data) && data[i] == '|' {
+		i++
+	}
+
+	for col = 0; col < columns && i < len(data); col++ {
+		for i < len(data) && isspace(data[i]) {
+			i++
+		}
+
+		cell_start := i
+
+		for i < len(data) && data[i] != '|' {
+			i++
+		}
+
+		cell_end := i - 1
+
+		for cell_end > cell_start && isspace(data[cell_end]) {
+			cell_end--
+		}
+
+		cell_work := bytes.NewBuffer(nil)
+		parseInline(cell_work, rndr, data[cell_start:cell_end+1])
+
+		if rndr.mk.tableCell != nil {
+			cdata := 0
+			if col < len(col_data) {
+				cdata = col_data[col]
+			}
+			rndr.mk.tableCell(row_work, cell_work.Bytes(), cdata, rndr.mk.opaque)
+		}
+
+		i++
+	}
+
+	for ; col < columns; col++ {
+		empty_cell := []byte{}
+		if rndr.mk.tableCell != nil {
+			cdata := 0
+			if col < len(col_data) {
+				cdata = col_data[col]
+			}
+			rndr.mk.tableCell(row_work, empty_cell, cdata, rndr.mk.opaque)
+		}
+	}
+
+	if rndr.mk.tableRow != nil {
+		rndr.mk.tableRow(out, row_work.Bytes(), rndr.mk.opaque)
+	}
+}
+
+// returns blockquote prefix length
+func blockQuotePrefix(data []byte) int {
+	i := 0
+	for i < len(data) && i < 3 && data[i] == ' ' {
+		i++
+	}
+	if i < len(data) && data[i] == '>' {
+		if i+1 < len(data) && (data[i+1] == ' ' || data[i+1] == '\t') {
+			return i + 2
+		}
+		return i + 1
+	}
+	return 0
+}
+
+// parse a blockquote fragment
+func blockQuote(out *bytes.Buffer, rndr *render, data []byte) int {
+	block := bytes.NewBuffer(nil)
+	work := bytes.NewBuffer(nil)
+	beg, end := 0, 0
+	for beg < len(data) {
+		for end = beg + 1; end < len(data) && data[end-1] != '\n'; end++ {
+		}
+
+		if pre := blockQuotePrefix(data[beg:]); pre > 0 {
+			beg += pre // skip prefix
+		} else {
+			// empty line followed by non-quote line
+			if isEmpty(data[beg:]) > 0 && (end >= len(data) || (blockQuotePrefix(data[end:]) == 0 && isEmpty(data[end:]) == 0)) {
+				break
+			}
+		}
+
+		if beg < end { // copy into the in-place working buffer
+			work.Write(data[beg:end])
+		}
+		beg = end
+	}
+
+	parseBlock(block, rndr, work.Bytes())
+	if rndr.mk.blockquote != nil {
+		rndr.mk.blockquote(out, block.Bytes(), rndr.mk.opaque)
+	}
+	return end
+}
+
+// returns prefix length for block code
+func blockCodePrefix(data []byte) int {
+	if len(data) > 0 && data[0] == '\t' {
+		return 1
+	}
+	if len(data) > 3 && data[0] == ' ' && data[1] == ' ' && data[2] == ' ' && data[3] == ' ' {
+		return 4
+	}
+	return 0
+}
+
+func blockCode(out *bytes.Buffer, rndr *render, data []byte) int {
+	work := bytes.NewBuffer(nil)
+
+	beg, end := 0, 0
+	for beg < len(data) {
+		for end = beg + 1; end < len(data) && data[end-1] != '\n'; end++ {
+		}
+
+		if pre := blockCodePrefix(data[beg:end]); pre > 0 {
+			beg += pre
+		} else {
+			if isEmpty(data[beg:end]) == 0 {
+				// non-empty non-prefixed line breaks the pre
+				break
+			}
+		}
+
+		if beg < end {
+			// verbatim copy to the working buffer, escaping entities
+			if isEmpty(data[beg:end]) > 0 {
+				work.WriteByte('\n')
+			} else {
+				work.Write(data[beg:end])
+			}
+		}
+		beg = end
+	}
+
+	// trim all the \n off the end of work
+	workbytes := work.Bytes()
+	n := 0
+	for len(workbytes) > n && workbytes[len(workbytes)-n-1] == '\n' {
+		n++
+	}
+	if n > 0 {
+		work = bytes.NewBuffer(workbytes[:len(workbytes)-n])
+	}
+
+	work.WriteByte('\n')
+
+	if rndr.mk.blockcode != nil {
+		rndr.mk.blockcode(out, work.Bytes(), "", rndr.mk.opaque)
+	}
+
+	return beg
+}
+
+// returns unordered list item prefix
+func blockUliPrefix(data []byte) int {
+	i := 0
+	for i < len(data) && i < 3 && data[i] == ' ' {
+		i++
+	}
+	if i+1 >= len(data) || (data[i] != '*' && data[i] != '+' && data[i] != '-') || (data[i+1] != ' ' && data[i+1] != '\t') {
+		return 0
+	}
+	return i + 2
+}
+
+// returns ordered list item prefix
+func blockOliPrefix(data []byte) int {
+	i := 0
+	for i < len(data) && i < 3 && data[i] == ' ' {
+		i++
+	}
+	if i >= len(data) || data[i] < '0' || data[i] > '9' {
+		return 0
+	}
+	for i < len(data) && data[i] >= '0' && data[i] <= '9' {
+		i++
+	}
+	if i+1 >= len(data) || data[i] != '.' || (data[i+1] != ' ' && data[i+1] != '\t') {
+		return 0
+	}
+	return i + 2
+}
+
+// parse ordered or unordered list block
+func blockList(out *bytes.Buffer, rndr *render, data []byte, flags int) int {
+	work := bytes.NewBuffer(nil)
+
+	i, j := 0, 0
+	for i < len(data) {
+		j = blockListItem(work, rndr, data[i:], &flags)
+		i += j
+
+		if j == 0 || flags&LIST_ITEM_END_OF_LIST != 0 {
+			break
+		}
+	}
+
+	if rndr.mk.list != nil {
+		rndr.mk.list(out, work.Bytes(), flags, rndr.mk.opaque)
+	}
+	return i
+}
+
+// parse a single list item
+// assumes initial prefix is already removed
+func blockListItem(out *bytes.Buffer, rndr *render, data []byte, flags *int) int {
+	// keep track of the first indentation prefix
+	beg, end, pre, sublist, orgpre, i := 0, 0, 0, 0, 0, 0
+
+	for orgpre < 3 && orgpre < len(data) && data[orgpre] == ' ' {
+		orgpre++
+	}
+
+	beg = blockUliPrefix(data)
+	if beg == 0 {
+		beg = blockOliPrefix(data)
+	}
+	if beg == 0 {
+		return 0
+	}
+
+	// skip leading whitespace on first line
+	for beg < len(data) && data[beg] == ' ' {
+		beg++
+	}
+
+	// skip to the beginning of the following line
+	end = beg
+	for end < len(data) && data[end-1] != '\n' {
+		end++
+	}
+
+	// get working buffers
+	work := bytes.NewBuffer(nil)
+	inter := bytes.NewBuffer(nil)
+
+	// put the first line into the working buffer
+	work.Write(data[beg:end])
+	beg = end
+
+	// process the following lines
+	in_empty, has_inside_empty := false, false
+	for beg < len(data) {
+		end++
+
+		for end < len(data) && data[end-1] != '\n' {
+			end++
+		}
+
+		// process an empty line
+		if isEmpty(data[beg:end]) > 0 {
+			in_empty = true
+			beg = end
+			continue
+		}
+
+		// calculate the indentation
+		i = 0
+		for i < 4 && beg+i < end && data[beg+i] == ' ' {
+			i++
+		}
+
+		pre = i
+		if data[beg] == '\t' {
+			i = 1
+			pre = 8
+		}
+
+		// check for a new item
+		chunk := data[beg+i : end]
+		if (blockUliPrefix(chunk) > 0 && !isHrule(chunk)) || blockOliPrefix(chunk) > 0 {
+			if in_empty {
+				has_inside_empty = true
+			}
+
+			if pre == orgpre { // the following item must have the same indentation
+				break
+			}
+
+			if sublist == 0 {
+				sublist = work.Len()
+			}
+		} else {
+			// only join indented stuff after empty lines
+			if in_empty && i < 4 && data[beg] != '\t' {
+				*flags |= LIST_ITEM_END_OF_LIST
+				break
+			} else {
+				if in_empty {
+					work.WriteByte('\n')
+					has_inside_empty = true
+				}
+			}
+		}
+
+		in_empty = false
+
+		// add the line into the working buffer without prefix
+		work.Write(data[beg+i : end])
+		beg = end
+	}
+
+	// render li contents
+	if has_inside_empty {
+		*flags |= LIST_ITEM_CONTAINS_BLOCK
+	}
+
+	workbytes := work.Bytes()
+	if *flags&LIST_ITEM_CONTAINS_BLOCK != 0 {
+		// intermediate render of block li
+		if sublist > 0 && sublist < len(workbytes) {
+			parseBlock(inter, rndr, workbytes[:sublist])
+			parseBlock(inter, rndr, workbytes[sublist:])
+		} else {
+			parseBlock(inter, rndr, workbytes)
+		}
+	} else {
+		// intermediate render of inline li
+		if sublist > 0 && sublist < len(workbytes) {
+			parseInline(inter, rndr, workbytes[:sublist])
+			parseBlock(inter, rndr, workbytes[sublist:])
+		} else {
+			parseInline(inter, rndr, workbytes)
+		}
+	}
+
+	// render li itself
+	if rndr.mk.listitem != nil {
+		rndr.mk.listitem(out, inter.Bytes(), *flags, rndr.mk.opaque)
+	}
+
+	return beg
+}
+
+func blockParagraph(out *bytes.Buffer, rndr *render, data []byte) int {
+	i, end, level := 0, 0, 0
+
+	for i < len(data) {
+		for end = i + 1; end < len(data) && data[end-1] != '\n'; end++ {
+		}
+
+		if isEmpty(data[i:]) > 0 {
+			break
+		}
+		if level = isUnderlinedHeader(data[i:]); level > 0 {
+			break
+		}
+
+		if rndr.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
+			if data[i] == '<' && rndr.mk.blockhtml != nil && blockHtml(out, rndr, data[i:], false) > 0 {
+				end = i
+				break
+			}
+		}
+
+		if isPrefixHeader(rndr, data[i:]) || isHrule(data[i:]) {
+			end = i
+			break
+		}
+
+		i = end
+	}
+
+	work := data
+	size := i
+	for size > 0 && work[size-1] == '\n' {
+		size--
+	}
+
+	if level == 0 {
+		tmp := bytes.NewBuffer(nil)
+		parseInline(tmp, rndr, work[:size])
+		if rndr.mk.paragraph != nil {
+			rndr.mk.paragraph(out, tmp.Bytes(), rndr.mk.opaque)
+		}
+	} else {
+		if size > 0 {
+			beg := 0
+			i = size
+			size--
+
+			for size > 0 && work[size] != '\n' {
+				size--
+			}
+
+			beg = size + 1
+			for size > 0 && work[size-1] == '\n' {
+				size--
+			}
+
+			if size > 0 {
+				tmp := bytes.NewBuffer(nil)
+				parseInline(tmp, rndr, work[:size])
+				if rndr.mk.paragraph != nil {
+					rndr.mk.paragraph(out, tmp.Bytes(), rndr.mk.opaque)
+				}
+
+				work = work[beg:]
+				size = i - beg
+			} else {
+				size = i
+			}
+		}
+
+		header_work := bytes.NewBuffer(nil)
+		parseInline(header_work, rndr, work[:size])
+
+		if rndr.mk.header != nil {
+			rndr.mk.header(out, header_work.Bytes(), level, rndr.mk.opaque)
+		}
+	}
+
+	return end
+}

@@ -18,12 +18,6 @@ "fmt"
 	"strconv"
 )
 
-//
-//
-// HTML rendering
-//
-//
-
 const (
 	HTML_SKIP_HTML = 1 << iota
 	HTML_SKIP_STYLE
@@ -41,7 +35,7 @@ HTML_SMARTYPANTS_LATEX_DASHES
 )
 
 type htmlOptions struct {
-	Flags     int
+	flags     int
 	close_tag string // how to end singleton tags: usually " />\n", possibly ">\n"
 	toc_data  struct {
 		header_count  int
@@ -57,78 +51,78 @@ func HtmlRenderer(flags int) *Renderer {
 	// configure the rendering engine
 	r := new(Renderer)
 	if flags&HTML_GITHUB_BLOCKCODE == 0 {
-		r.blockcode = rndr_blockcode
+		r.blockcode = htmlBlockcode
 	} else {
-		r.blockcode = rndr_blockcode_github
+		r.blockcode = htmlBlockcodeGithub
 	}
-	r.blockquote = rndr_blockquote
+	r.blockquote = htmlBlockquote
 	if flags&HTML_SKIP_HTML == 0 {
-		r.blockhtml = rndr_raw_block
+		r.blockhtml = htmlRawBlock
 	}
-	r.header = rndr_header
-	r.hrule = rndr_hrule
-	r.list = rndr_list
-	r.listitem = rndr_listitem
-	r.paragraph = rndr_paragraph
-	r.table = rndr_table
-	r.tableRow = rndr_tablerow
-	r.tableCell = rndr_tablecell
+	r.header = htmlHeader
+	r.hrule = htmlHrule
+	r.list = htmlList
+	r.listitem = htmlListitem
+	r.paragraph = htmlParagraph
+	r.table = htmlTable
+	r.tableRow = htmlTablerow
+	r.tableCell = htmlTablecell
 
-	r.autolink = rndr_autolink
-	r.codespan = rndr_codespan
-	r.doubleEmphasis = rndr_double_emphasis
-	r.emphasis = rndr_emphasis
+	r.autolink = htmlAutolink
+	r.codespan = htmlCodespan
+	r.doubleEmphasis = htmlDoubleEmphasis
+	r.emphasis = htmlEmphasis
 	if flags&HTML_SKIP_IMAGES == 0 {
-		r.image = rndr_image
+		r.image = htmlImage
 	}
-	r.linebreak = rndr_linebreak
+	r.linebreak = htmlLinebreak
 	if flags&HTML_SKIP_LINKS == 0 {
-		r.link = rndr_link
+		r.link = htmlLink
 	}
-	r.rawHtmlTag = rndr_raw_html_tag
-	r.tripleEmphasis = rndr_triple_emphasis
-	r.strikethrough = rndr_strikethrough
+	r.rawHtmlTag = htmlRawTag
+	r.tripleEmphasis = htmlTripleEmphasis
+	r.strikethrough = htmlStrikethrough
 
 	var cb *SmartypantsRenderer
 	if flags&HTML_USE_SMARTYPANTS == 0 {
-		r.normalText = rndr_normal_text
+		r.normalText = htmlNormalText
 	} else {
 		cb = Smartypants(flags)
-		r.normalText = rndr_smartypants
+		r.normalText = htmlSmartypants
 	}
 
 	close_tag := html_close
 	if flags&HTML_USE_XHTML != 0 {
 		close_tag = xhtml_close
 	}
-	r.opaque = &htmlOptions{Flags: flags, close_tag: close_tag, smartypants: cb}
+	r.opaque = &htmlOptions{flags: flags, close_tag: close_tag, smartypants: cb}
 	return r
 }
 
 func HtmlTocRenderer(flags int) *Renderer {
 	// configure the rendering engine
 	r := new(Renderer)
-	r.header = rndr_toc_header
+	r.header = htmlTocHeader
 
-	r.codespan = rndr_codespan
-	r.doubleEmphasis = rndr_double_emphasis
-	r.emphasis = rndr_emphasis
-	r.tripleEmphasis = rndr_triple_emphasis
-	r.strikethrough = rndr_strikethrough
+	r.codespan = htmlCodespan
+	r.doubleEmphasis = htmlDoubleEmphasis
+	r.emphasis = htmlEmphasis
+	r.tripleEmphasis = htmlTripleEmphasis
+	r.strikethrough = htmlStrikethrough
 
-	r.documentFooter = rndr_toc_finalize
+	r.documentFooter = htmlTocFinalize
 
 	close_tag := ">\n"
 	if flags&HTML_USE_XHTML != 0 {
 		close_tag = " />\n"
 	}
-	r.opaque = &htmlOptions{Flags: flags | HTML_TOC, close_tag: close_tag}
+	r.opaque = &htmlOptions{flags: flags | HTML_TOC, close_tag: close_tag}
 	return r
 }
 
-func attr_escape(ob *bytes.Buffer, src []byte) {
+func attrEscape(ob *bytes.Buffer, src []byte) {
 	for i := 0; i < len(src); i++ {
-		// directly copy unescaped characters
+		// directly copy normal characters
 		org := i
 		for i < len(src) && src[i] != '<' && src[i] != '>' && src[i] != '&' && src[i] != '"' {
 			i++
@@ -154,35 +148,14 @@ }
 	}
 }
 
-func unescape_text(ob *bytes.Buffer, src []byte) {
-	i := 0
-	for i < len(src) {
-		org := i
-		for i < len(src) && src[i] != '\\' {
-			i++
-		}
-
-		if i > org {
-			ob.Write(src[org:i])
-		}
-
-		if i+1 >= len(src) {
-			break
-		}
-
-		ob.WriteByte(src[i+1])
-		i += 2
-	}
-}
-
-func rndr_header(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
+func htmlHeader(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
 	options := opaque.(*htmlOptions)
 
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
 
-	if options.Flags&HTML_TOC != 0 {
+	if options.flags&HTML_TOC != 0 {
 		ob.WriteString(fmt.Sprintf("<h%d id=\"toc_%d\">", level, options.toc_data.header_count))
 		options.toc_data.header_count++
 	} else {
@@ -193,7 +166,7 @@ ob.Write(text)
 	ob.WriteString(fmt.Sprintf("</h%d>\n", level))
 }
 
-func rndr_raw_block(ob *bytes.Buffer, text []byte, opaque interface{}) {
+func htmlRawBlock(ob *bytes.Buffer, text []byte, opaque interface{}) {
 	sz := len(text)
 	for sz > 0 && text[sz-1] == '\n' {
 		sz--
@@ -212,7 +185,7 @@ ob.Write(text[org:sz])
 	ob.WriteByte('\n')
 }
 
-func rndr_hrule(ob *bytes.Buffer, opaque interface{}) {
+func htmlHrule(ob *bytes.Buffer, opaque interface{}) {
 	options := opaque.(*htmlOptions)
 
 	if ob.Len() > 0 {
@@ -222,7 +195,7 @@ ob.WriteString("<hr")
 	ob.WriteString(options.close_tag)
 }
 
-func rndr_blockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
+func htmlBlockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
@@ -248,7 +221,7 @@
 				if cls > 0 {
 					ob.WriteByte(' ')
 				}
-				attr_escape(ob, []byte(lang[org:]))
+				attrEscape(ob, []byte(lang[org:]))
 			}
 		}
 
@@ -258,7 +231,7 @@ ob.WriteString("<pre><code>")
 	}
 
 	if len(text) > 0 {
-		attr_escape(ob, text)
+		attrEscape(ob, text)
 	}
 
 	ob.WriteString("</code></pre>\n")
@@ -282,7 +255,7 @@ * Note that we only generate HTML for the first specifier.
  * E.g.
  *              ~~~~ {.python .numbered}        =>      <pre lang="python"><code>
  */
-func rndr_blockcode_github(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
+func htmlBlockcodeGithub(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
@@ -296,9 +269,9 @@ i++
 		}
 
 		if lang[0] == '.' {
-			attr_escape(ob, []byte(lang[1:i]))
+			attrEscape(ob, []byte(lang[1:i]))
 		} else {
-			attr_escape(ob, []byte(lang[:i]))
+			attrEscape(ob, []byte(lang[:i]))
 		}
 
 		ob.WriteString("\"><code>")
@@ -307,20 +280,20 @@ ob.WriteString("<pre><code>")
 	}
 
 	if len(text) > 0 {
-		attr_escape(ob, text)
+		attrEscape(ob, text)
 	}
 
 	ob.WriteString("</code></pre>\n")
 }
 
 
-func rndr_blockquote(ob *bytes.Buffer, text []byte, opaque interface{}) {
+func htmlBlockquote(ob *bytes.Buffer, text []byte, opaque interface{}) {
 	ob.WriteString("<blockquote>\n")
 	ob.Write(text)
 	ob.WriteString("</blockquote>")
 }
 
-func rndr_table(ob *bytes.Buffer, header []byte, body []byte, opaque interface{}) {
+func htmlTable(ob *bytes.Buffer, header []byte, body []byte, opaque interface{}) {
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
@@ -331,7 +304,7 @@ ob.Write(body)
 	ob.WriteString("\n</tbody></table>")
 }
 
-func rndr_tablerow(ob *bytes.Buffer, text []byte, opaque interface{}) {
+func htmlTablerow(ob *bytes.Buffer, text []byte, opaque interface{}) {
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
@@ -340,7 +313,7 @@ ob.Write(text)
 	ob.WriteString("\n</tr>")
 }
 
-func rndr_tablecell(ob *bytes.Buffer, text []byte, align int, opaque interface{}) {
+func htmlTablecell(ob *bytes.Buffer, text []byte, align int, opaque interface{}) {
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
@@ -359,7 +332,7 @@ ob.Write(text)
 	ob.WriteString("</td>")
 }
 
-func rndr_list(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
+func htmlList(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
 	if ob.Len() > 0 {
 		ob.WriteByte('\n')
 	}
@@ -376,7 +349,7 @@ ob.WriteString("</ul>\n")
 	}
 }
 
-func rndr_listitem(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
+func htmlListitem(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
 	ob.WriteString("<li>")
 	size := len(text)
 	for size > 0 && text[size-1] == '\n' {
@@ -386,7 +359,7 @@ ob.Write(text[:size])
 	ob.WriteString("</li>\n")
 }
 
-func rndr_paragraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
+func htmlParagraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
 	options := opaque.(*htmlOptions)
 	i := 0
 
@@ -407,7 +380,7 @@ return
 	}
 
 	ob.WriteString("<p>")
-	if options.Flags&HTML_HARD_WRAP != 0 {
+	if options.flags&HTML_HARD_WRAP != 0 {
 		for i < len(text) {
 			org := i
 			for i < len(text) && text[i] != '\n' {
@@ -432,13 +405,13 @@ }
 	ob.WriteString("</p>\n")
 }
 
-func rndr_autolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{}) int {
+func htmlAutolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{}) int {
 	options := opaque.(*htmlOptions)
 
 	if len(link) == 0 {
 		return 0
 	}
-	if options.Flags&HTML_SAFELINK != 0 && !isSafeLink(link) && kind != LINK_TYPE_EMAIL {
+	if options.flags&HTML_SAFELINK != 0 && !isSafeLink(link) && kind != LINK_TYPE_EMAIL {
 		return 0
 	}
 
@@ -455,9 +428,9 @@ * an actual URI, e.g. `mailto:foo@bar.com`, we don't
 	 * want to print the `mailto:` prefix
 	 */
 	if bytes.HasPrefix(link, []byte("mailto:")) {
-		attr_escape(ob, link[7:])
+		attrEscape(ob, link[7:])
 	} else {
-		attr_escape(ob, link)
+		attrEscape(ob, link)
 	}
 
 	ob.WriteString("</a>")
@@ -465,14 +438,14 @@
 	return 1
 }
 
-func rndr_codespan(ob *bytes.Buffer, text []byte, opaque interface{}) int {
+func htmlCodespan(ob *bytes.Buffer, text []byte, opaque interface{}) int {
 	ob.WriteString("<code>")
-	attr_escape(ob, text)
+	attrEscape(ob, text)
 	ob.WriteString("</code>")
 	return 1
 }
 
-func rndr_double_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
+func htmlDoubleEmphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
 	if len(text) == 0 {
 		return 0
 	}
@@ -482,7 +455,7 @@ ob.WriteString("</strong>")
 	return 1
 }
 
-func rndr_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
+func htmlEmphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
 	if len(text) == 0 {
 		return 0
 	}
@@ -492,20 +465,20 @@ ob.WriteString("</em>")
 	return 1
 }
 
-func rndr_image(ob *bytes.Buffer, link []byte, title []byte, alt []byte, opaque interface{}) int {
+func htmlImage(ob *bytes.Buffer, link []byte, title []byte, alt []byte, opaque interface{}) int {
 	options := opaque.(*htmlOptions)
 	if len(link) == 0 {
 		return 0
 	}
 	ob.WriteString("<img src=\"")
-	attr_escape(ob, link)
+	attrEscape(ob, link)
 	ob.WriteString("\" alt=\"")
 	if len(alt) > 0 {
-		attr_escape(ob, alt)
+		attrEscape(ob, alt)
 	}
 	if len(title) > 0 {
 		ob.WriteString("\" title=\"")
-		attr_escape(ob, title)
+		attrEscape(ob, title)
 	}
 
 	ob.WriteByte('"')
@@ -513,17 +486,17 @@ ob.WriteString(options.close_tag)
 	return 1
 }
 
-func rndr_linebreak(ob *bytes.Buffer, opaque interface{}) int {
+func htmlLinebreak(ob *bytes.Buffer, opaque interface{}) int {
 	options := opaque.(*htmlOptions)
 	ob.WriteString("<br")
 	ob.WriteString(options.close_tag)
 	return 1
 }
 
-func rndr_link(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaque interface{}) int {
+func htmlLink(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaque interface{}) int {
 	options := opaque.(*htmlOptions)
 
-	if options.Flags&HTML_SAFELINK != 0 && !isSafeLink(link) {
+	if options.flags&HTML_SAFELINK != 0 && !isSafeLink(link) {
 		return 0
 	}
 
@@ -533,7 +506,7 @@ ob.Write(link)
 	}
 	if len(title) > 0 {
 		ob.WriteString("\" title=\"")
-		attr_escape(ob, title)
+		attrEscape(ob, title)
 	}
 	ob.WriteString("\">")
 	if len(content) > 0 {
@@ -543,25 +516,25 @@ ob.WriteString("</a>")
 	return 1
 }
 
-func rndr_raw_html_tag(ob *bytes.Buffer, text []byte, opaque interface{}) int {
+func htmlRawTag(ob *bytes.Buffer, text []byte, opaque interface{}) int {
 	options := opaque.(*htmlOptions)
-	if options.Flags&HTML_SKIP_HTML != 0 {
+	if options.flags&HTML_SKIP_HTML != 0 {
 		return 1
 	}
-	if options.Flags&HTML_SKIP_STYLE != 0 && is_html_tag(text, "style") {
+	if options.flags&HTML_SKIP_STYLE != 0 && isHtmlTag(text, "style") {
 		return 1
 	}
-	if options.Flags&HTML_SKIP_LINKS != 0 && is_html_tag(text, "a") {
+	if options.flags&HTML_SKIP_LINKS != 0 && isHtmlTag(text, "a") {
 		return 1
 	}
-	if options.Flags&HTML_SKIP_IMAGES != 0 && is_html_tag(text, "img") {
+	if options.flags&HTML_SKIP_IMAGES != 0 && isHtmlTag(text, "img") {
 		return 1
 	}
 	ob.Write(text)
 	return 1
 }
 
-func rndr_triple_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
+func htmlTripleEmphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
 	if len(text) == 0 {
 		return 0
 	}
@@ -571,7 +544,7 @@ ob.WriteString("</em></strong>")
 	return 1
 }
 
-func rndr_strikethrough(ob *bytes.Buffer, text []byte, opaque interface{}) int {
+func htmlStrikethrough(ob *bytes.Buffer, text []byte, opaque interface{}) int {
 	if len(text) == 0 {
 		return 0
 	}
@@ -581,11 +554,11 @@ ob.WriteString("</del>")
 	return 1
 }
 
-func rndr_normal_text(ob *bytes.Buffer, text []byte, opaque interface{}) {
-	attr_escape(ob, text)
+func htmlNormalText(ob *bytes.Buffer, text []byte, opaque interface{}) {
+	attrEscape(ob, text)
 }
 
-func rndr_toc_header(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
+func htmlTocHeader(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
 	options := opaque.(*htmlOptions)
 	for level > options.toc_data.current_level {
 		if options.toc_data.current_level > 0 {
@@ -614,7 +587,7 @@ }
 	ob.WriteString("</a></li>\n")
 }
 
-func rndr_toc_finalize(ob *bytes.Buffer, opaque interface{}) {
+func htmlTocFinalize(ob *bytes.Buffer, opaque interface{}) {
 	options := opaque.(*htmlOptions)
 	for options.toc_data.current_level > 1 {
 		ob.WriteString("</ul></li>\n")
@@ -626,7 +599,7 @@ ob.WriteString("</ul>\n")
 	}
 }
 
-func is_html_tag(tag []byte, tagname string) bool {
+func isHtmlTag(tag []byte, tagname string) bool {
 	i := 0
 	if i < len(tag) && tag[0] != '<' {
 		return false

@@ -0,0 +1,970 @@
+//
+// Black Friday Markdown Processor
+// Originally based on http://github.com/tanoku/upskirt
+// by Russ Ross <russ@russross.com>
+//
+
+//
+// Functions to parse inline elements.
+//
+
+package blackfriday
+
+import (
+	"bytes"
+)
+
+// Functions to parse text within a block
+// Each function returns the number of chars taken care of
+// data is the complete block being rendered
+// offset is the number of valid chars before the current cursor
+
+func parseInline(out *bytes.Buffer, rndr *render, data []byte) {
+	if rndr.nesting >= rndr.maxNesting {
+		return
+	}
+	rndr.nesting++
+
+	i, end := 0, 0
+	for i < len(data) {
+		// copy inactive chars into the output
+		for end < len(data) && rndr.inline[data[end]] == nil {
+			end++
+		}
+
+		if rndr.mk.normalText != nil {
+			rndr.mk.normalText(out, data[i:end], rndr.mk.opaque)
+		} else {
+			out.Write(data[i:end])
+		}
+
+		if end >= len(data) {
+			break
+		}
+		i = end
+
+		// call the trigger
+		parser := rndr.inline[data[end]]
+		end = parser(out, rndr, data, i)
+
+		if end == 0 { // no action from the callback
+			end = i + 1
+		} else {
+			i += end
+			end = i
+		}
+	}
+
+	rndr.nesting--
+}
+
+// single and double emphasis parsing
+func inlineEmphasis(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	data = data[offset:]
+	c := data[0]
+	ret := 0
+
+	if len(data) > 2 && data[1] != c {
+		// whitespace cannot follow an opening emphasis;
+		// strikethrough only takes two characters '~~'
+		if c == '~' || isspace(data[1]) {
+			return 0
+		}
+		if ret = inlineHelperEmph1(out, rndr, data[1:], c); ret == 0 {
+			return 0
+		}
+
+		return ret + 1
+	}
+
+	if len(data) > 3 && data[1] == c && data[2] != c {
+		if isspace(data[2]) {
+			return 0
+		}
+		if ret = inlineHelperEmph2(out, rndr, data[2:], c); ret == 0 {
+			return 0
+		}
+
+		return ret + 2
+	}
+
+	if len(data) > 4 && data[1] == c && data[2] == c && data[3] != c {
+		if c == '~' || isspace(data[3]) {
+			return 0
+		}
+		if ret = inlineHelperEmph3(out, rndr, data, 3, c); ret == 0 {
+			return 0
+		}
+
+		return ret + 3
+	}
+
+	return 0
+}
+
+func inlineCodespan(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	data = data[offset:]
+
+	nb := 0
+
+	// count the number of backticks in the delimiter
+	for nb < len(data) && data[nb] == '`' {
+		nb++
+	}
+
+	// find the next delimiter
+	i, end := 0, 0
+	for end = nb; end < len(data) && i < nb; end++ {
+		if data[end] == '`' {
+			i++
+		} else {
+			i = 0
+		}
+	}
+
+	if i < nb && end >= len(data) {
+		return 0 // no matching delimiter
+	}
+
+	// trim outside whitespace
+	f_begin := nb
+	for f_begin < end && (data[f_begin] == ' ' || data[f_begin] == '\t') {
+		f_begin++
+	}
+
+	f_end := end - nb
+	for f_end > nb && (data[f_end-1] == ' ' || data[f_end-1] == '\t') {
+		f_end--
+	}
+
+	// real code span
+	if rndr.mk.codespan == nil {
+		return 0
+	}
+	if f_begin < f_end {
+		if rndr.mk.codespan(out, data[f_begin:f_end], rndr.mk.opaque) == 0 {
+			end = 0
+		}
+	} else {
+		if rndr.mk.codespan(out, nil, rndr.mk.opaque) == 0 {
+			end = 0
+		}
+	}
+
+	return end
+
+}
+
+// '\n' preceded by two spaces
+func inlineLinebreak(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	if offset < 2 || data[offset-1] != ' ' || data[offset-2] != ' ' {
+		return 0
+	}
+
+	// remove trailing spaces from out and render
+	outBytes := out.Bytes()
+	end := len(outBytes)
+	for end > 0 && outBytes[end-1] == ' ' {
+		end--
+	}
+	out.Truncate(end)
+
+	if rndr.mk.linebreak == nil {
+		return 0
+	}
+	if rndr.mk.linebreak(out, rndr.mk.opaque) > 0 {
+		return 1
+	} else {
+		return 0
+	}
+
+	return 0
+}
+
+// '[': parse a link or an image
+func inlineLink(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	isImg := offset > 0 && data[offset-1] == '!'
+
+	data = data[offset:]
+
+	i := 1
+	var title, link []byte
+	text_has_nl := false
+
+	// check whether the correct renderer exists
+	if (isImg && rndr.mk.image == nil) || (!isImg && rndr.mk.link == nil) {
+		return 0
+	}
+
+	// look for the matching closing bracket
+	for level := 1; level > 0 && i < len(data); i++ {
+		switch {
+		case data[i] == '\n':
+			text_has_nl = true
+
+		case data[i-1] == '\\':
+			continue
+
+		case data[i] == '[':
+			level++
+
+		case data[i] == ']':
+			level--
+			if level <= 0 {
+				i-- // compensate for extra i++ in for loop
+			}
+		}
+	}
+
+	if i >= len(data) {
+		return 0
+	}
+
+	txt_e := i
+	i++
+
+	// skip any amount of whitespace or newline
+	// (this is much more lax than original markdown syntax)
+	for i < len(data) && isspace(data[i]) {
+		i++
+	}
+
+	// inline style link
+	switch {
+	case i < len(data) && data[i] == '(':
+		// skip initial whitespace
+		i++
+
+		for i < len(data) && isspace(data[i]) {
+			i++
+		}
+
+		link_b := i
+
+		// look for link end: ' " )
+		for i < len(data) {
+			if data[i] == '\\' {
+				i += 2
+			} else {
+				if data[i] == ')' || data[i] == '\'' || data[i] == '"' {
+					break
+				}
+				i++
+			}
+		}
+
+		if i >= len(data) {
+			return 0
+		}
+		link_e := i
+
+		// look for title end if present
+		title_b, title_e := 0, 0
+		if data[i] == '\'' || data[i] == '"' {
+			i++
+			title_b = i
+
+			for i < len(data) {
+				if data[i] == '\\' {
+					i += 2
+				} else {
+					if data[i] == ')' {
+						break
+					}
+					i++
+				}
+			}
+
+			if i >= len(data) {
+				return 0
+			}
+
+			// skip whitespace after title
+			title_e = i - 1
+			for title_e > title_b && isspace(data[title_e]) {
+				title_e--
+			}
+
+			// check for closing quote presence
+			if data[title_e] != '\'' && data[title_e] != '"' {
+				title_b, title_e = 0, 0
+				link_e = i
+			}
+		}
+
+		// remove whitespace at the end of the link
+		for link_e > link_b && isspace(data[link_e-1]) {
+			link_e--
+		}
+
+		// remove optional angle brackets around the link
+		if data[link_b] == '<' {
+			link_b++
+		}
+		if data[link_e-1] == '>' {
+			link_e--
+		}
+
+		// build escaped link and title
+		if link_e > link_b {
+			link = data[link_b:link_e]
+		}
+
+		if title_e > title_b {
+			title = data[title_b:title_e]
+		}
+
+		i++
+
+	// reference style link
+	case i < len(data) && data[i] == '[':
+		var id []byte
+
+		// look for the id
+		i++
+		link_b := i
+		for i < len(data) && data[i] != ']' {
+			i++
+		}
+		if i >= len(data) {
+			return 0
+		}
+		link_e := i
+
+		// find the reference
+		if link_b == link_e {
+			if text_has_nl {
+				b := bytes.NewBuffer(nil)
+
+				for j := 1; j < txt_e; j++ {
+					switch {
+					case data[j] != '\n':
+						b.WriteByte(data[j])
+					case data[j-1] != ' ':
+						b.WriteByte(' ')
+					}
+				}
+
+				id = b.Bytes()
+			} else {
+				id = data[1:txt_e]
+			}
+		} else {
+			id = data[link_b:link_e]
+		}
+
+		// find the reference with matching id (ids are case-insensitive)
+		key := string(bytes.ToLower(id))
+		lr, ok := rndr.refs[key]
+		if !ok {
+			return 0
+		}
+
+		// keep link and title from reference
+		link = lr.link
+		title = lr.title
+		i++
+
+	// shortcut reference style link
+	default:
+		var id []byte
+
+		// craft the id
+		if text_has_nl {
+			b := bytes.NewBuffer(nil)
+
+			for j := 1; j < txt_e; j++ {
+				switch {
+				case data[j] != '\n':
+					b.WriteByte(data[j])
+				case data[j-1] != ' ':
+					b.WriteByte(' ')
+				}
+			}
+
+			id = b.Bytes()
+		} else {
+			id = data[1:txt_e]
+		}
+
+		// find the reference with matching id
+		key := string(bytes.ToLower(id))
+		lr, ok := rndr.refs[key]
+		if !ok {
+			return 0
+		}
+
+		// keep link and title from reference
+		link = lr.link
+		title = lr.title
+
+		// rewind the whitespace
+		i = txt_e + 1
+	}
+
+	// build content: img alt is escaped, link content is parsed
+	content := bytes.NewBuffer(nil)
+	if txt_e > 1 {
+		if isImg {
+			content.Write(data[1:txt_e])
+		} else {
+			parseInline(content, rndr, data[1:txt_e])
+		}
+	}
+
+	var u_link []byte
+	if len(link) > 0 {
+		u_link_buf := bytes.NewBuffer(nil)
+		unescapeText(u_link_buf, link)
+		u_link = u_link_buf.Bytes()
+	}
+
+	// call the relevant rendering function
+	ret := 0
+	if isImg {
+		outSize := out.Len()
+		outBytes := out.Bytes()
+		if outSize > 0 && outBytes[outSize-1] == '!' {
+			out.Truncate(outSize - 1)
+		}
+
+		ret = rndr.mk.image(out, u_link, title, content.Bytes(), rndr.mk.opaque)
+	} else {
+		ret = rndr.mk.link(out, u_link, title, content.Bytes(), rndr.mk.opaque)
+	}
+
+	if ret > 0 {
+		return i
+	}
+	return 0
+}
+
+// '<' when tags or autolinks are allowed
+func inlineLangle(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	data = data[offset:]
+	altype := LINK_TYPE_NOT_AUTOLINK
+	end := tagLength(data, &altype)
+	ret := 0
+
+	if end > 2 {
+		switch {
+		case rndr.mk.autolink != nil && altype != LINK_TYPE_NOT_AUTOLINK:
+			u_link := bytes.NewBuffer(nil)
+			unescapeText(u_link, data[1:end+1-2])
+			ret = rndr.mk.autolink(out, u_link.Bytes(), altype, rndr.mk.opaque)
+		case rndr.mk.rawHtmlTag != nil:
+			ret = rndr.mk.rawHtmlTag(out, data[:end], rndr.mk.opaque)
+		}
+	}
+
+	if ret == 0 {
+		return 0
+	}
+	return end
+}
+
+// '\\' backslash escape
+var escapeChars = []byte("\\`*_{}[]()#+-.!:|&<>")
+
+func inlineEscape(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	data = data[offset:]
+
+	if len(data) > 1 {
+		if bytes.IndexByte(escapeChars, data[1]) < 0 {
+			return 0
+		}
+
+		if rndr.mk.normalText != nil {
+			rndr.mk.normalText(out, data[1:2], rndr.mk.opaque)
+		} else {
+			out.WriteByte(data[1])
+		}
+	}
+
+	return 2
+}
+
+func unescapeText(ob *bytes.Buffer, src []byte) {
+	i := 0
+	for i < len(src) {
+		org := i
+		for i < len(src) && src[i] != '\\' {
+			i++
+		}
+
+		if i > org {
+			ob.Write(src[org:i])
+		}
+
+		if i+1 >= len(src) {
+			break
+		}
+
+		ob.WriteByte(src[i+1])
+		i += 2
+	}
+}
+
+// '&' escaped when it doesn't belong to an entity
+// valid entities are assumed to be anything matching &#?[A-Za-z0-9]+;
+func inlineEntity(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	data = data[offset:]
+
+	end := 1
+
+	if end < len(data) && data[end] == '#' {
+		end++
+	}
+
+	for end < len(data) && isalnum(data[end]) {
+		end++
+	}
+
+	if end < len(data) && data[end] == ';' {
+		end++ // real entity
+	} else {
+		return 0 // lone '&'
+	}
+
+	if rndr.mk.entity != nil {
+		rndr.mk.entity(out, data[:end], rndr.mk.opaque)
+	} else {
+		out.Write(data[:end])
+	}
+
+	return end
+}
+
+func inlineAutolink(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
+	orig_data := data
+	data = data[offset:]
+
+	if offset > 0 {
+		if !isspace(orig_data[offset-1]) && !ispunct(orig_data[offset-1]) {
+			return 0
+		}
+	}
+
+	if !isSafeLink(data) {
+		return 0
+	}
+
+	link_end := 0
+	for link_end < len(data) && !isspace(data[link_end]) {
+		link_end++
+	}
+
+	// Skip punctuation at the end of the link
+	if (data[link_end-1] == '.' || data[link_end-1] == ',' || data[link_end-1] == ';') && data[link_end-2] != '\\' {
+		link_end--
+	}
+
+	// See if the link finishes with a punctuation sign that can be closed.
+	var copen byte
+	switch data[link_end-1] {
+	case '"':
+		copen = '"'
+	case '\'':
+		copen = '\''
+	case ')':
+		copen = '('
+	case ']':
+		copen = '['
+	case '}':
+		copen = '{'
+	default:
+		copen = 0
+	}
+
+	if copen != 0 {
+		buf_end := offset + link_end - 2
+
+		open_delim := 1
+
+		/* Try to close the final punctuation sign in this same line;
+		 * if we managed to close it outside of the URL, that means that it's
+		 * not part of the URL. If it closes inside the URL, that means it
+		 * is part of the URL.
+		 *
+		 * Examples:
+		 *
+		 *      foo http://www.pokemon.com/Pikachu_(Electric) bar
+		 *              => http://www.pokemon.com/Pikachu_(Electric)
+		 *
+		 *      foo (http://www.pokemon.com/Pikachu_(Electric)) bar
+		 *              => http://www.pokemon.com/Pikachu_(Electric)
+		 *
+		 *      foo http://www.pokemon.com/Pikachu_(Electric)) bar
+		 *              => http://www.pokemon.com/Pikachu_(Electric))
+		 *
+		 *      (foo http://www.pokemon.com/Pikachu_(Electric)) bar
+		 *              => foo http://www.pokemon.com/Pikachu_(Electric)
+		 */
+
+		for buf_end >= 0 && orig_data[buf_end] != '\n' && open_delim != 0 {
+			if orig_data[buf_end] == data[link_end-1] {
+				open_delim++
+			}
+
+			if orig_data[buf_end] == copen {
+				open_delim--
+			}
+
+			buf_end--
+		}
+
+		if open_delim == 0 {
+			link_end--
+		}
+	}
+
+	if rndr.mk.autolink != nil {
+		u_link := bytes.NewBuffer(nil)
+		unescapeText(u_link, data[:link_end])
+
+		rndr.mk.autolink(out, u_link.Bytes(), LINK_TYPE_NORMAL, rndr.mk.opaque)
+	}
+
+	return link_end
+}
+
+var validUris = [][]byte{[]byte("http://"), []byte("https://"), []byte("ftp://"), []byte("mailto://")}
+
+func isSafeLink(link []byte) bool {
+	for _, prefix := range validUris {
+		// TODO: handle unicode here
+		// case-insensitive prefix test
+		if len(link) > len(prefix) && !less(link[:len(prefix)], prefix) && !less(prefix, link[:len(prefix)]) && isalnum(link[len(prefix)]) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// return the length of the given tag, or 0 is it's not valid
+func tagLength(data []byte, autolink *int) int {
+	var i, j int
+
+	// a valid tag can't be shorter than 3 chars
+	if len(data) < 3 {
+		return 0
+	}
+
+	// begins with a '<' optionally followed by '/', followed by letter or number
+	if data[0] != '<' {
+		return 0
+	}
+	if data[1] == '/' {
+		i = 2
+	} else {
+		i = 1
+	}
+
+	if !isalnum(data[i]) {
+		return 0
+	}
+
+	// scheme test
+	*autolink = LINK_TYPE_NOT_AUTOLINK
+
+	// try to find the beggining of an URI
+	for i < len(data) && (isalnum(data[i]) || data[i] == '.' || data[i] == '+' || data[i] == '-') {
+		i++
+	}
+
+	if i > 1 && data[i] == '@' {
+		if j = isMailtoAutolink(data[i:]); j != 0 {
+			*autolink = LINK_TYPE_EMAIL
+			return i + j
+		}
+	}
+
+	if i > 2 && data[i] == ':' {
+		*autolink = LINK_TYPE_NORMAL
+		i++
+	}
+
+	// complete autolink test: no whitespace or ' or "
+	switch {
+	case i >= len(data):
+		*autolink = LINK_TYPE_NOT_AUTOLINK
+	case *autolink != 0:
+		j = i
+
+		for i < len(data) {
+			if data[i] == '\\' {
+				i += 2
+			} else {
+				if data[i] == '>' || data[i] == '\'' || data[i] == '"' || isspace(data[i]) {
+					break
+				} else {
+					i++
+				}
+			}
+
+		}
+
+		if i >= len(data) {
+			return 0
+		}
+		if i > j && data[i] == '>' {
+			return i + 1
+		}
+
+		// one of the forbidden chars has been found
+		*autolink = LINK_TYPE_NOT_AUTOLINK
+	}
+
+	// look for something looking like a tag end
+	for i < len(data) && data[i] != '>' {
+		i++
+	}
+	if i >= len(data) {
+		return 0
+	}
+	return i + 1
+}
+
+// look for the address part of a mail autolink and '>'
+// this is less strict than the original markdown e-mail address matching
+func isMailtoAutolink(data []byte) int {
+	nb := 0
+
+	// address is assumed to be: [-@._a-zA-Z0-9]+ with exactly one '@'
+	for i := 0; i < len(data); i++ {
+		if isalnum(data[i]) {
+			continue
+		}
+
+		switch data[i] {
+		case '@':
+			nb++
+
+		case '-', '.', '_':
+			break
+
+		case '>':
+			if nb == 1 {
+				return i + 1
+			} else {
+				return 0
+			}
+		default:
+			return 0
+		}
+	}
+
+	return 0
+}
+
+// look for the next emph char, skipping other constructs
+func inlineHelperFindEmphChar(data []byte, c byte) int {
+	i := 1
+
+	for i < len(data) {
+		for i < len(data) && data[i] != c && data[i] != '`' && data[i] != '[' {
+			i++
+		}
+		if i >= len(data) {
+			return 0
+		}
+		if data[i] == c {
+			return i
+		}
+
+		// do not count escaped chars
+		if i != 0 && data[i-1] == '\\' {
+			i++
+			continue
+		}
+
+		if data[i] == '`' {
+			// skip a code span
+			tmp_i := 0
+			i++
+			for i < len(data) && data[i] != '`' {
+				if tmp_i == 0 && data[i] == c {
+					tmp_i = i
+				}
+				i++
+			}
+			if i >= len(data) {
+				return tmp_i
+			}
+			i++
+		} else {
+			if data[i] == '[' {
+				// skip a link
+				tmp_i := 0
+				i++
+				for i < len(data) && data[i] != ']' {
+					if tmp_i == 0 && data[i] == c {
+						tmp_i = i
+					}
+					i++
+				}
+				i++
+				for i < len(data) && (data[i] == ' ' || data[i] == '\t' || data[i] == '\n') {
+					i++
+				}
+				if i >= len(data) {
+					return tmp_i
+				}
+				if data[i] != '[' && data[i] != '(' { // not a link
+					if tmp_i > 0 {
+						return tmp_i
+					} else {
+						continue
+					}
+				}
+				cc := data[i]
+				i++
+				for i < len(data) && data[i] != cc {
+					if tmp_i == 0 && data[i] == c {
+						tmp_i = i
+					}
+					i++
+				}
+				if i >= len(data) {
+					return tmp_i
+				}
+				i++
+			}
+		}
+	}
+	return 0
+}
+
+func inlineHelperEmph1(out *bytes.Buffer, rndr *render, data []byte, c byte) int {
+	i := 0
+
+	if rndr.mk.emphasis == nil {
+		return 0
+	}
+
+	// skip one symbol if coming from emph3
+	if len(data) > 1 && data[0] == c && data[1] == c {
+		i = 1
+	}
+
+	for i < len(data) {
+		length := inlineHelperFindEmphChar(data[i:], c)
+		if length == 0 {
+			return 0
+		}
+		i += length
+		if i >= len(data) {
+			return 0
+		}
+
+		if i+1 < len(data) && data[i+1] == c {
+			i++
+			continue
+		}
+
+		if data[i] == c && !isspace(data[i-1]) {
+
+			if rndr.flags&EXTENSION_NO_INTRA_EMPHASIS != 0 {
+				if !(i+1 == len(data) || isspace(data[i+1]) || ispunct(data[i+1])) {
+					continue
+				}
+			}
+
+			work := bytes.NewBuffer(nil)
+			parseInline(work, rndr, data[:i])
+			r := rndr.mk.emphasis(out, work.Bytes(), rndr.mk.opaque)
+			if r > 0 {
+				return i + 1
+			} else {
+				return 0
+			}
+		}
+	}
+
+	return 0
+}
+
+func inlineHelperEmph2(out *bytes.Buffer, rndr *render, data []byte, c byte) int {
+	render_method := rndr.mk.doubleEmphasis
+	if c == '~' {
+		render_method = rndr.mk.strikethrough
+	}
+
+	if render_method == nil {
+		return 0
+	}
+
+	i := 0
+
+	for i < len(data) {
+		length := inlineHelperFindEmphChar(data[i:], c)
+		if length == 0 {
+			return 0
+		}
+		i += length
+
+		if i+1 < len(data) && data[i] == c && data[i+1] == c && i > 0 && !isspace(data[i-1]) {
+			work := bytes.NewBuffer(nil)
+			parseInline(work, rndr, data[:i])
+			r := render_method(out, work.Bytes(), rndr.mk.opaque)
+			if r > 0 {
+				return i + 2
+			} else {
+				return 0
+			}
+		}
+		i++
+	}
+	return 0
+}
+
+func inlineHelperEmph3(out *bytes.Buffer, rndr *render, data []byte, offset int, c byte) int {
+	i := 0
+	orig_data := data
+	data = data[offset:]
+
+	for i < len(data) {
+		length := inlineHelperFindEmphChar(data[i:], c)
+		if length == 0 {
+			return 0
+		}
+		i += length
+
+		// skip whitespace preceded symbols
+		if data[i] != c || isspace(data[i-1]) {
+			continue
+		}
+
+		switch {
+		case (i+2 < len(data) && data[i+1] == c && data[i+2] == c && rndr.mk.tripleEmphasis != nil):
+			// triple symbol found
+			work := bytes.NewBuffer(nil)
+
+			parseInline(work, rndr, data[:i])
+			r := rndr.mk.tripleEmphasis(out, work.Bytes(), rndr.mk.opaque)
+			if r > 0 {
+				return i + 3
+			} else {
+				return 0
+			}
+		case (i+1 < len(data) && data[i+1] == c):
+			// double symbol found, hand over to emph1
+			length = inlineHelperEmph1(out, rndr, orig_data[offset-2:], c)
+			if length == 0 {
+				return 0
+			} else {
+				return length - 2
+			}
+		default:
+			// single symbol found, hand over to emph2
+			length = inlineHelperEmph2(out, rndr, orig_data[offset-1:], c)
+			if length == 0 {
+				return 0
+			} else {
+				return length - 1
+			}
+		}
+	}
+	return 0
+}

@@ -255,1964 +255,6 @@ }
 
 
 //
-// Inline parsing
-// Functions to parse text within a block. Each:
-//   returns the number of chars taken care of
-//   data is the complete block being rendered
-//   offset is the number of valid chars before the data
-//
-
-func parseInline(out *bytes.Buffer, rndr *render, data []byte) {
-	if rndr.nesting >= rndr.maxNesting {
-		return
-	}
-	rndr.nesting++
-
-	i, end := 0, 0
-	for i < len(data) {
-		// copy inactive chars into the output
-		for end < len(data) && rndr.inline[data[end]] == nil {
-			end++
-		}
-
-		if rndr.mk.normalText != nil {
-			rndr.mk.normalText(out, data[i:end], rndr.mk.opaque)
-		} else {
-			out.Write(data[i:end])
-		}
-
-		if end >= len(data) {
-			break
-		}
-		i = end
-
-		// call the trigger
-		parser := rndr.inline[data[end]]
-		end = parser(out, rndr, data, i)
-
-		if end == 0 { // no action from the callback
-			end = i + 1
-		} else {
-			i += end
-			end = i
-		}
-	}
-
-	rndr.nesting--
-}
-
-// single and double emphasis parsing
-func inlineEmphasis(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	data = data[offset:]
-	c := data[0]
-	ret := 0
-
-	if len(data) > 2 && data[1] != c {
-		// whitespace cannot follow an opening emphasis;
-		// strikethrough only takes two characters '~~'
-		if c == '~' || isspace(data[1]) {
-			return 0
-		}
-		if ret = inlineHelperEmph1(out, rndr, data[1:], c); ret == 0 {
-			return 0
-		}
-
-		return ret + 1
-	}
-
-	if len(data) > 3 && data[1] == c && data[2] != c {
-		if isspace(data[2]) {
-			return 0
-		}
-		if ret = inlineHelperEmph2(out, rndr, data[2:], c); ret == 0 {
-			return 0
-		}
-
-		return ret + 2
-	}
-
-	if len(data) > 4 && data[1] == c && data[2] == c && data[3] != c {
-		if c == '~' || isspace(data[3]) {
-			return 0
-		}
-		if ret = inlineHelperEmph3(out, rndr, data, 3, c); ret == 0 {
-			return 0
-		}
-
-		return ret + 3
-	}
-
-	return 0
-}
-
-func inlineCodespan(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	data = data[offset:]
-
-	nb := 0
-
-	// count the number of backticks in the delimiter
-	for nb < len(data) && data[nb] == '`' {
-		nb++
-	}
-
-	// find the next delimiter
-	i, end := 0, 0
-	for end = nb; end < len(data) && i < nb; end++ {
-		if data[end] == '`' {
-			i++
-		} else {
-			i = 0
-		}
-	}
-
-	if i < nb && end >= len(data) {
-		return 0 // no matching delimiter
-	}
-
-	// trim outside whitespace
-	f_begin := nb
-	for f_begin < end && (data[f_begin] == ' ' || data[f_begin] == '\t') {
-		f_begin++
-	}
-
-	f_end := end - nb
-	for f_end > nb && (data[f_end-1] == ' ' || data[f_end-1] == '\t') {
-		f_end--
-	}
-
-	// real code span
-	if rndr.mk.codespan == nil {
-		return 0
-	}
-	if f_begin < f_end {
-		if rndr.mk.codespan(out, data[f_begin:f_end], rndr.mk.opaque) == 0 {
-			end = 0
-		}
-	} else {
-		if rndr.mk.codespan(out, nil, rndr.mk.opaque) == 0 {
-			end = 0
-		}
-	}
-
-	return end
-
-}
-
-// '\n' preceded by two spaces
-func inlineLinebreak(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	if offset < 2 || data[offset-1] != ' ' || data[offset-2] != ' ' {
-		return 0
-	}
-
-	// remove trailing spaces from out and render
-	outBytes := out.Bytes()
-	end := len(outBytes)
-	for end > 0 && outBytes[end-1] == ' ' {
-		end--
-	}
-	out.Truncate(end)
-
-	if rndr.mk.linebreak == nil {
-		return 0
-	}
-	if rndr.mk.linebreak(out, rndr.mk.opaque) > 0 {
-		return 1
-	} else {
-		return 0
-	}
-
-	return 0
-}
-
-// '[': parse a link or an image
-func inlineLink(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	isImg := offset > 0 && data[offset-1] == '!'
-
-	data = data[offset:]
-
-	i := 1
-	var title, link []byte
-	text_has_nl := false
-
-	// check whether the correct renderer exists
-	if (isImg && rndr.mk.image == nil) || (!isImg && rndr.mk.link == nil) {
-		return 0
-	}
-
-	// look for the matching closing bracket
-	for level := 1; level > 0 && i < len(data); i++ {
-		switch {
-		case data[i] == '\n':
-			text_has_nl = true
-
-		case data[i-1] == '\\':
-			continue
-
-		case data[i] == '[':
-			level++
-
-		case data[i] == ']':
-			level--
-			if level <= 0 {
-				i-- // compensate for extra i++ in for loop
-			}
-		}
-	}
-
-	if i >= len(data) {
-		return 0
-	}
-
-	txt_e := i
-	i++
-
-	// skip any amount of whitespace or newline
-	// (this is much more lax than original markdown syntax)
-	for i < len(data) && isspace(data[i]) {
-		i++
-	}
-
-	// inline style link
-	switch {
-	case i < len(data) && data[i] == '(':
-		// skip initial whitespace
-		i++
-
-		for i < len(data) && isspace(data[i]) {
-			i++
-		}
-
-		link_b := i
-
-		// look for link end: ' " )
-		for i < len(data) {
-			if data[i] == '\\' {
-				i += 2
-			} else {
-				if data[i] == ')' || data[i] == '\'' || data[i] == '"' {
-					break
-				}
-				i++
-			}
-		}
-
-		if i >= len(data) {
-			return 0
-		}
-		link_e := i
-
-		// look for title end if present
-		title_b, title_e := 0, 0
-		if data[i] == '\'' || data[i] == '"' {
-			i++
-			title_b = i
-
-			for i < len(data) {
-				if data[i] == '\\' {
-					i += 2
-				} else {
-					if data[i] == ')' {
-						break
-					}
-					i++
-				}
-			}
-
-			if i >= len(data) {
-				return 0
-			}
-
-			// skip whitespace after title
-			title_e = i - 1
-			for title_e > title_b && isspace(data[title_e]) {
-				title_e--
-			}
-
-			// check for closing quote presence
-			if data[title_e] != '\'' && data[title_e] != '"' {
-				title_b, title_e = 0, 0
-				link_e = i
-			}
-		}
-
-		// remove whitespace at the end of the link
-		for link_e > link_b && isspace(data[link_e-1]) {
-			link_e--
-		}
-
-		// remove optional angle brackets around the link
-		if data[link_b] == '<' {
-			link_b++
-		}
-		if data[link_e-1] == '>' {
-			link_e--
-		}
-
-		// build escaped link and title
-		if link_e > link_b {
-			link = data[link_b:link_e]
-		}
-
-		if title_e > title_b {
-			title = data[title_b:title_e]
-		}
-
-		i++
-
-	// reference style link
-	case i < len(data) && data[i] == '[':
-		var id []byte
-
-		// look for the id
-		i++
-		link_b := i
-		for i < len(data) && data[i] != ']' {
-			i++
-		}
-		if i >= len(data) {
-			return 0
-		}
-		link_e := i
-
-		// find the reference
-		if link_b == link_e {
-			if text_has_nl {
-				b := bytes.NewBuffer(nil)
-
-				for j := 1; j < txt_e; j++ {
-					switch {
-					case data[j] != '\n':
-						b.WriteByte(data[j])
-					case data[j-1] != ' ':
-						b.WriteByte(' ')
-					}
-				}
-
-				id = b.Bytes()
-			} else {
-				id = data[1:txt_e]
-			}
-		} else {
-			id = data[link_b:link_e]
-		}
-
-		// find the reference with matching id (ids are case-insensitive)
-		key := string(bytes.ToLower(id))
-		lr, ok := rndr.refs[key]
-		if !ok {
-			return 0
-		}
-
-		// keep link and title from reference
-		link = lr.link
-		title = lr.title
-		i++
-
-	// shortcut reference style link
-	default:
-		var id []byte
-
-		// craft the id
-		if text_has_nl {
-			b := bytes.NewBuffer(nil)
-
-			for j := 1; j < txt_e; j++ {
-				switch {
-				case data[j] != '\n':
-					b.WriteByte(data[j])
-				case data[j-1] != ' ':
-					b.WriteByte(' ')
-				}
-			}
-
-			id = b.Bytes()
-		} else {
-			id = data[1:txt_e]
-		}
-
-		// find the reference with matching id
-		key := string(bytes.ToLower(id))
-		lr, ok := rndr.refs[key]
-		if !ok {
-			return 0
-		}
-
-		// keep link and title from reference
-		link = lr.link
-		title = lr.title
-
-		// rewind the whitespace
-		i = txt_e + 1
-	}
-
-	// build content: img alt is escaped, link content is parsed
-	content := bytes.NewBuffer(nil)
-	if txt_e > 1 {
-		if isImg {
-			content.Write(data[1:txt_e])
-		} else {
-			parseInline(content, rndr, data[1:txt_e])
-		}
-	}
-
-	var u_link []byte
-	if len(link) > 0 {
-		u_link_buf := bytes.NewBuffer(nil)
-		unescape_text(u_link_buf, link)
-		u_link = u_link_buf.Bytes()
-	}
-
-	// call the relevant rendering function
-	ret := 0
-	if isImg {
-		outSize := out.Len()
-		outBytes := out.Bytes()
-		if outSize > 0 && outBytes[outSize-1] == '!' {
-			out.Truncate(outSize - 1)
-		}
-
-		ret = rndr.mk.image(out, u_link, title, content.Bytes(), rndr.mk.opaque)
-	} else {
-		ret = rndr.mk.link(out, u_link, title, content.Bytes(), rndr.mk.opaque)
-	}
-
-	if ret > 0 {
-		return i
-	}
-	return 0
-}
-
-// '<' when tags or autolinks are allowed
-func inlineLangle(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	data = data[offset:]
-	altype := LINK_TYPE_NOT_AUTOLINK
-	end := tagLength(data, &altype)
-	ret := 0
-
-	if end > 2 {
-		switch {
-		case rndr.mk.autolink != nil && altype != LINK_TYPE_NOT_AUTOLINK:
-			u_link := bytes.NewBuffer(nil)
-			unescape_text(u_link, data[1:end+1-2])
-			ret = rndr.mk.autolink(out, u_link.Bytes(), altype, rndr.mk.opaque)
-		case rndr.mk.rawHtmlTag != nil:
-			ret = rndr.mk.rawHtmlTag(out, data[:end], rndr.mk.opaque)
-		}
-	}
-
-	if ret == 0 {
-		return 0
-	}
-	return end
-}
-
-// '\\' backslash escape
-var escapeChars = []byte("\\`*_{}[]()#+-.!:|&<>")
-
-func inlineEscape(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	data = data[offset:]
-
-	if len(data) > 1 {
-		if bytes.IndexByte(escapeChars, data[1]) < 0 {
-			return 0
-		}
-
-		if rndr.mk.normalText != nil {
-			rndr.mk.normalText(out, data[1:2], rndr.mk.opaque)
-		} else {
-			out.WriteByte(data[1])
-		}
-	}
-
-	return 2
-}
-
-// '&' escaped when it doesn't belong to an entity
-// valid entities are assumed to be anything matching &#?[A-Za-z0-9]+;
-func inlineEntity(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	data = data[offset:]
-
-	end := 1
-
-	if end < len(data) && data[end] == '#' {
-		end++
-	}
-
-	for end < len(data) && isalnum(data[end]) {
-		end++
-	}
-
-	if end < len(data) && data[end] == ';' {
-		end++ // real entity
-	} else {
-		return 0 // lone '&'
-	}
-
-	if rndr.mk.entity != nil {
-		rndr.mk.entity(out, data[:end], rndr.mk.opaque)
-	} else {
-		out.Write(data[:end])
-	}
-
-	return end
-}
-
-func inlineAutolink(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
-	orig_data := data
-	data = data[offset:]
-
-	if offset > 0 {
-		if !isspace(orig_data[offset-1]) && !ispunct(orig_data[offset-1]) {
-			return 0
-		}
-	}
-
-	if !isSafeLink(data) {
-		return 0
-	}
-
-	link_end := 0
-	for link_end < len(data) && !isspace(data[link_end]) {
-		link_end++
-	}
-
-	// Skip punctuation at the end of the link
-	if (data[link_end-1] == '.' || data[link_end-1] == ',' || data[link_end-1] == ';') && data[link_end-2] != '\\' {
-		link_end--
-	}
-
-	// See if the link finishes with a punctuation sign that can be closed.
-	var copen byte
-	switch data[link_end-1] {
-	case '"':
-		copen = '"'
-	case '\'':
-		copen = '\''
-	case ')':
-		copen = '('
-	case ']':
-		copen = '['
-	case '}':
-		copen = '{'
-	default:
-		copen = 0
-	}
-
-	if copen != 0 {
-		buf_end := offset + link_end - 2
-
-		open_delim := 1
-
-		/* Try to close the final punctuation sign in this same line;
-		 * if we managed to close it outside of the URL, that means that it's
-		 * not part of the URL. If it closes inside the URL, that means it
-		 * is part of the URL.
-		 *
-		 * Examples:
-		 *
-		 *      foo http://www.pokemon.com/Pikachu_(Electric) bar
-		 *              => http://www.pokemon.com/Pikachu_(Electric)
-		 *
-		 *      foo (http://www.pokemon.com/Pikachu_(Electric)) bar
-		 *              => http://www.pokemon.com/Pikachu_(Electric)
-		 *
-		 *      foo http://www.pokemon.com/Pikachu_(Electric)) bar
-		 *              => http://www.pokemon.com/Pikachu_(Electric))
-		 *
-		 *      (foo http://www.pokemon.com/Pikachu_(Electric)) bar
-		 *              => foo http://www.pokemon.com/Pikachu_(Electric)
-		 */
-
-		for buf_end >= 0 && orig_data[buf_end] != '\n' && open_delim != 0 {
-			if orig_data[buf_end] == data[link_end-1] {
-				open_delim++
-			}
-
-			if orig_data[buf_end] == copen {
-				open_delim--
-			}
-
-			buf_end--
-		}
-
-		if open_delim == 0 {
-			link_end--
-		}
-	}
-
-	if rndr.mk.autolink != nil {
-		u_link := bytes.NewBuffer(nil)
-		unescape_text(u_link, data[:link_end])
-
-		rndr.mk.autolink(out, u_link.Bytes(), LINK_TYPE_NORMAL, rndr.mk.opaque)
-	}
-
-	return link_end
-}
-
-var validUris = [][]byte{[]byte("http://"), []byte("https://"), []byte("ftp://"), []byte("mailto://")}
-
-func isSafeLink(link []byte) bool {
-	for _, prefix := range validUris {
-		// TODO: handle unicode here
-		// case-insensitive prefix test
-		if len(link) > len(prefix) && !less(link[:len(prefix)], prefix) && !less(prefix, link[:len(prefix)]) && isalnum(link[len(prefix)]) {
-			return true
-		}
-	}
-
-	return false
-}
-
-// return the length of the given tag, or 0 is it's not valid
-func tagLength(data []byte, autolink *int) int {
-	var i, j int
-
-	// a valid tag can't be shorter than 3 chars
-	if len(data) < 3 {
-		return 0
-	}
-
-	// begins with a '<' optionally followed by '/', followed by letter or number
-	if data[0] != '<' {
-		return 0
-	}
-	if data[1] == '/' {
-		i = 2
-	} else {
-		i = 1
-	}
-
-	if !isalnum(data[i]) {
-		return 0
-	}
-
-	// scheme test
-	*autolink = LINK_TYPE_NOT_AUTOLINK
-
-	// try to find the beggining of an URI
-	for i < len(data) && (isalnum(data[i]) || data[i] == '.' || data[i] == '+' || data[i] == '-') {
-		i++
-	}
-
-	if i > 1 && data[i] == '@' {
-		if j = isMailtoAutolink(data[i:]); j != 0 {
-			*autolink = LINK_TYPE_EMAIL
-			return i + j
-		}
-	}
-
-	if i > 2 && data[i] == ':' {
-		*autolink = LINK_TYPE_NORMAL
-		i++
-	}
-
-	// complete autolink test: no whitespace or ' or "
-	switch {
-	case i >= len(data):
-		*autolink = LINK_TYPE_NOT_AUTOLINK
-	case *autolink != 0:
-		j = i
-
-		for i < len(data) {
-			if data[i] == '\\' {
-				i += 2
-			} else {
-				if data[i] == '>' || data[i] == '\'' || data[i] == '"' || isspace(data[i]) {
-					break
-				} else {
-					i++
-				}
-			}
-
-		}
-
-		if i >= len(data) {
-			return 0
-		}
-		if i > j && data[i] == '>' {
-			return i + 1
-		}
-
-		// one of the forbidden chars has been found
-		*autolink = LINK_TYPE_NOT_AUTOLINK
-	}
-
-	// look for something looking like a tag end
-	for i < len(data) && data[i] != '>' {
-		i++
-	}
-	if i >= len(data) {
-		return 0
-	}
-	return i + 1
-}
-
-// look for the address part of a mail autolink and '>'
-// this is less strict than the original markdown e-mail address matching
-func isMailtoAutolink(data []byte) int {
-	nb := 0
-
-	// address is assumed to be: [-@._a-zA-Z0-9]+ with exactly one '@'
-	for i := 0; i < len(data); i++ {
-		if isalnum(data[i]) {
-			continue
-		}
-
-		switch data[i] {
-		case '@':
-			nb++
-
-		case '-', '.', '_':
-			break
-
-		case '>':
-			if nb == 1 {
-				return i + 1
-			} else {
-				return 0
-			}
-		default:
-			return 0
-		}
-	}
-
-	return 0
-}
-
-// look for the next emph char, skipping other constructs
-func inlineHelperFindEmphChar(data []byte, c byte) int {
-	i := 1
-
-	for i < len(data) {
-		for i < len(data) && data[i] != c && data[i] != '`' && data[i] != '[' {
-			i++
-		}
-		if i >= len(data) {
-			return 0
-		}
-		if data[i] == c {
-			return i
-		}
-
-		// do not count escaped chars
-		if i != 0 && data[i-1] == '\\' {
-			i++
-			continue
-		}
-
-		if data[i] == '`' {
-			// skip a code span
-			tmp_i := 0
-			i++
-			for i < len(data) && data[i] != '`' {
-				if tmp_i == 0 && data[i] == c {
-					tmp_i = i
-				}
-				i++
-			}
-			if i >= len(data) {
-				return tmp_i
-			}
-			i++
-		} else {
-			if data[i] == '[' {
-				// skip a link
-				tmp_i := 0
-				i++
-				for i < len(data) && data[i] != ']' {
-					if tmp_i == 0 && data[i] == c {
-						tmp_i = i
-					}
-					i++
-				}
-				i++
-				for i < len(data) && (data[i] == ' ' || data[i] == '\t' || data[i] == '\n') {
-					i++
-				}
-				if i >= len(data) {
-					return tmp_i
-				}
-				if data[i] != '[' && data[i] != '(' { // not a link
-					if tmp_i > 0 {
-						return tmp_i
-					} else {
-						continue
-					}
-				}
-				cc := data[i]
-				i++
-				for i < len(data) && data[i] != cc {
-					if tmp_i == 0 && data[i] == c {
-						tmp_i = i
-					}
-					i++
-				}
-				if i >= len(data) {
-					return tmp_i
-				}
-				i++
-			}
-		}
-	}
-	return 0
-}
-
-func inlineHelperEmph1(out *bytes.Buffer, rndr *render, data []byte, c byte) int {
-	i := 0
-
-	if rndr.mk.emphasis == nil {
-		return 0
-	}
-
-	// skip one symbol if coming from emph3
-	if len(data) > 1 && data[0] == c && data[1] == c {
-		i = 1
-	}
-
-	for i < len(data) {
-		length := inlineHelperFindEmphChar(data[i:], c)
-		if length == 0 {
-			return 0
-		}
-		i += length
-		if i >= len(data) {
-			return 0
-		}
-
-		if i+1 < len(data) && data[i+1] == c {
-			i++
-			continue
-		}
-
-		if data[i] == c && !isspace(data[i-1]) {
-
-			if rndr.flags&EXTENSION_NO_INTRA_EMPHASIS != 0 {
-				if !(i+1 == len(data) || isspace(data[i+1]) || ispunct(data[i+1])) {
-					continue
-				}
-			}
-
-			work := bytes.NewBuffer(nil)
-			parseInline(work, rndr, data[:i])
-			r := rndr.mk.emphasis(out, work.Bytes(), rndr.mk.opaque)
-			if r > 0 {
-				return i + 1
-			} else {
-				return 0
-			}
-		}
-	}
-
-	return 0
-}
-
-func inlineHelperEmph2(out *bytes.Buffer, rndr *render, data []byte, c byte) int {
-	render_method := rndr.mk.doubleEmphasis
-	if c == '~' {
-		render_method = rndr.mk.strikethrough
-	}
-
-	if render_method == nil {
-		return 0
-	}
-
-	i := 0
-
-	for i < len(data) {
-		length := inlineHelperFindEmphChar(data[i:], c)
-		if length == 0 {
-			return 0
-		}
-		i += length
-
-		if i+1 < len(data) && data[i] == c && data[i+1] == c && i > 0 && !isspace(data[i-1]) {
-			work := bytes.NewBuffer(nil)
-			parseInline(work, rndr, data[:i])
-			r := render_method(out, work.Bytes(), rndr.mk.opaque)
-			if r > 0 {
-				return i + 2
-			} else {
-				return 0
-			}
-		}
-		i++
-	}
-	return 0
-}
-
-func inlineHelperEmph3(out *bytes.Buffer, rndr *render, data []byte, offset int, c byte) int {
-	i := 0
-	orig_data := data
-	data = data[offset:]
-
-	for i < len(data) {
-		length := inlineHelperFindEmphChar(data[i:], c)
-		if length == 0 {
-			return 0
-		}
-		i += length
-
-		// skip whitespace preceded symbols
-		if data[i] != c || isspace(data[i-1]) {
-			continue
-		}
-
-		switch {
-		case (i+2 < len(data) && data[i+1] == c && data[i+2] == c && rndr.mk.tripleEmphasis != nil):
-			// triple symbol found
-			work := bytes.NewBuffer(nil)
-
-			parseInline(work, rndr, data[:i])
-			r := rndr.mk.tripleEmphasis(out, work.Bytes(), rndr.mk.opaque)
-			if r > 0 {
-				return i + 3
-			} else {
-				return 0
-			}
-		case (i+1 < len(data) && data[i+1] == c):
-			// double symbol found, hand over to emph1
-			length = inlineHelperEmph1(out, rndr, orig_data[offset-2:], c)
-			if length == 0 {
-				return 0
-			} else {
-				return length - 2
-			}
-		default:
-			// single symbol found, hand over to emph2
-			length = inlineHelperEmph2(out, rndr, orig_data[offset-1:], c)
-			if length == 0 {
-				return 0
-			} else {
-				return length - 1
-			}
-		}
-	}
-	return 0
-}
-
-
-//
-// Block parsing
-// Functions to parse block-level elements.
-//
-
-// parse block-level data
-func parseBlock(out *bytes.Buffer, rndr *render, data []byte) {
-	if rndr.nesting >= rndr.maxNesting {
-		return
-	}
-	rndr.nesting++
-
-	for len(data) > 0 {
-		if isPrefixHeader(rndr, data) {
-			data = data[blockPrefixHeader(out, rndr, data):]
-			continue
-		}
-		if data[0] == '<' && rndr.mk.blockhtml != nil {
-			if i := blockHtml(out, rndr, data, true); i > 0 {
-				data = data[i:]
-				continue
-			}
-		}
-		if i := isEmpty(data); i > 0 {
-			data = data[i:]
-			continue
-		}
-		if isHrule(data) {
-			if rndr.mk.hrule != nil {
-				rndr.mk.hrule(out, rndr.mk.opaque)
-			}
-			var i int
-			for i = 0; i < len(data) && data[i] != '\n'; i++ {
-			}
-			data = data[i:]
-			continue
-		}
-		if rndr.flags&EXTENSION_FENCED_CODE != 0 {
-			if i := blockFencedCode(out, rndr, data); i > 0 {
-				data = data[i:]
-				continue
-			}
-		}
-		if rndr.flags&EXTENSION_TABLES != 0 {
-			if i := blockTable(out, rndr, data); i > 0 {
-				data = data[i:]
-				continue
-			}
-		}
-		if blockQuotePrefix(data) > 0 {
-			data = data[blockQuote(out, rndr, data):]
-			continue
-		}
-		if blockCodePrefix(data) > 0 {
-			data = data[blockCode(out, rndr, data):]
-			continue
-		}
-		if blockUliPrefix(data) > 0 {
-			data = data[blockList(out, rndr, data, 0):]
-			continue
-		}
-		if blockOliPrefix(data) > 0 {
-			data = data[blockList(out, rndr, data, LIST_TYPE_ORDERED):]
-			continue
-		}
-
-		data = data[blockParagraph(out, rndr, data):]
-	}
-
-	rndr.nesting--
-}
-
-func isPrefixHeader(rndr *render, data []byte) bool {
-	if data[0] != '#' {
-		return false
-	}
-
-	if rndr.flags&EXTENSION_SPACE_HEADERS != 0 {
-		level := 0
-		for level < len(data) && level < 6 && data[level] == '#' {
-			level++
-		}
-		if level < len(data) && data[level] != ' ' && data[level] != '\t' {
-			return false
-		}
-	}
-	return true
-}
-
-func blockPrefixHeader(out *bytes.Buffer, rndr *render, data []byte) int {
-	level := 0
-	for level < len(data) && level < 6 && data[level] == '#' {
-		level++
-	}
-	i, end := 0, 0
-	for i = level; i < len(data) && (data[i] == ' ' || data[i] == '\t'); i++ {
-	}
-	for end = i; end < len(data) && data[end] != '\n'; end++ {
-	}
-	skip := end
-	for end > 0 && data[end-1] == '#' {
-		end--
-	}
-	for end > 0 && (data[end-1] == ' ' || data[end-1] == '\t') {
-		end--
-	}
-	if end > i {
-		work := bytes.NewBuffer(nil)
-		parseInline(work, rndr, data[i:end])
-		if rndr.mk.header != nil {
-			rndr.mk.header(out, work.Bytes(), level, rndr.mk.opaque)
-		}
-	}
-	return skip
-}
-
-func isUnderlinedHeader(data []byte) int {
-	i := 0
-
-	// test of level 1 header
-	if data[i] == '=' {
-		for i = 1; i < len(data) && data[i] == '='; i++ {
-		}
-		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
-			i++
-		}
-		if i >= len(data) || data[i] == '\n' {
-			return 1
-		} else {
-			return 0
-		}
-	}
-
-	// test of level 2 header
-	if data[i] == '-' {
-		for i = 1; i < len(data) && data[i] == '-'; i++ {
-		}
-		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
-			i++
-		}
-		if i >= len(data) || data[i] == '\n' {
-			return 2
-		} else {
-			return 0
-		}
-	}
-
-	return 0
-}
-
-func blockHtml(out *bytes.Buffer, rndr *render, data []byte, do_render bool) int {
-	var i, j int
-
-	// identify the opening tag
-	if len(data) < 2 || data[0] != '<' {
-		return 0
-	}
-	curtag, tagfound := blockHtmlFindTag(data[1:])
-
-	// handle special cases
-	if !tagfound {
-
-		// HTML comment, laxist form
-		if len(data) > 5 && data[1] == '!' && data[2] == '-' && data[3] == '-' {
-			i = 5
-
-			for i < len(data) && !(data[i-2] == '-' && data[i-1] == '-' && data[i] == '>') {
-				i++
-			}
-			i++
-
-			if i < len(data) {
-				j = isEmpty(data[i:])
-			}
-
-			if j > 0 {
-				size := i + j
-				if do_render && rndr.mk.blockhtml != nil {
-					rndr.mk.blockhtml(out, data[:size], rndr.mk.opaque)
-				}
-				return size
-			}
-		}
-
-		// HR, which is the only self-closing block tag considered
-		if len(data) > 4 && (data[1] == 'h' || data[1] == 'H') && (data[2] == 'r' || data[2] == 'R') {
-			i = 3
-			for i < len(data) && data[i] != '>' {
-				i++
-			}
-
-			if i+1 < len(data) {
-				i++
-				j = isEmpty(data[i:])
-				if j > 0 {
-					size := i + j
-					if do_render && rndr.mk.blockhtml != nil {
-						rndr.mk.blockhtml(out, data[:size], rndr.mk.opaque)
-					}
-					return size
-				}
-			}
-		}
-
-		// no special case recognized
-		return 0
-	}
-
-	// look for an unindented matching closing tag
-	//      followed by a blank line
-	i = 1
-	found := false
-
-	// if not found, try a second pass looking for indented match
-	// but not if tag is "ins" or "del" (following original Markdown.pl)
-	if curtag != "ins" && curtag != "del" {
-		i = 1
-		for i < len(data) {
-			i++
-			for i < len(data) && !(data[i-1] == '<' && data[i] == '/') {
-				i++
-			}
-
-			if i+2+len(curtag) >= len(data) {
-				break
-			}
-
-			j = blockHtmlFindEnd(curtag, rndr, data[i-1:])
-
-			if j > 0 {
-				i += j - 1
-				found = true
-				break
-			}
-		}
-	}
-
-	if !found {
-		return 0
-	}
-
-	// the end of the block has been found
-	if do_render && rndr.mk.blockhtml != nil {
-		rndr.mk.blockhtml(out, data[:i], rndr.mk.opaque)
-	}
-
-	return i
-}
-
-func blockHtmlFindTag(data []byte) (string, bool) {
-	i := 0
-	for i < len(data) && ((data[i] >= '0' && data[i] <= '9') || (data[i] >= 'A' && data[i] <= 'Z') || (data[i] >= 'a' && data[i] <= 'z')) {
-		i++
-	}
-	if i >= len(data) {
-		return "", false
-	}
-	key := string(data[:i])
-	if block_tags[key] {
-		return key, true
-	}
-	return "", false
-}
-
-func blockHtmlFindEnd(tag string, rndr *render, data []byte) int {
-	// assume data[0] == '<' && data[1] == '/' already tested
-
-	// check if tag is a match
-	if len(tag)+3 >= len(data) || bytes.Compare(data[2:2+len(tag)], []byte(tag)) != 0 || data[len(tag)+2] != '>' {
-		return 0
-	}
-
-	// check white lines
-	i := len(tag) + 3
-	w := 0
-	if i < len(data) {
-		if w = isEmpty(data[i:]); w == 0 {
-			return 0 // non-blank after tag
-		}
-	}
-	i += w
-	w = 0
-
-	if rndr.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
-		if i < len(data) {
-			w = isEmpty(data[i:])
-		}
-	} else {
-		if i < len(data) {
-			if w = isEmpty(data[i:]); w == 0 {
-				return 0 // non-blank line after tag line
-			}
-		}
-	}
-
-	return i + w
-}
-
-func isEmpty(data []byte) int {
-	var i int
-	for i = 0; i < len(data) && data[i] != '\n'; i++ {
-		if data[i] != ' ' && data[i] != '\t' {
-			return 0
-		}
-	}
-	return i + 1
-}
-
-func isHrule(data []byte) bool {
-	// skip initial spaces
-	if len(data) < 3 {
-		return false
-	}
-	i := 0
-	if data[0] == ' ' {
-		i++
-		if data[1] == ' ' {
-			i++
-			if data[2] == ' ' {
-				i++
-			}
-		}
-	}
-
-	// look at the hrule char
-	if i+2 >= len(data) || (data[i] != '*' && data[i] != '-' && data[i] != '_') {
-		return false
-	}
-	c := data[i]
-
-	// the whole line must be the char or whitespace
-	n := 0
-	for i < len(data) && data[i] != '\n' {
-		switch {
-		case data[i] == c:
-			n++
-		case data[i] != ' ' && data[i] != '\t':
-			return false
-		}
-		i++
-	}
-
-	return n >= 3
-}
-
-func isFencedCode(data []byte, syntax **string) int {
-	i, n := 0, 0
-
-	// skip initial spaces
-	if len(data) < 3 {
-		return 0
-	}
-	if data[0] == ' ' {
-		i++
-		if data[1] == ' ' {
-			i++
-			if data[2] == ' ' {
-				i++
-			}
-		}
-	}
-
-	// look at the hrule char
-	if i+2 >= len(data) || !(data[i] == '~' || data[i] == '`') {
-		return 0
-	}
-
-	c := data[i]
-
-	// the whole line must be the char or whitespace
-	for i < len(data) && data[i] == c {
-		n++
-		i++
-	}
-
-	if n < 3 {
-		return 0
-	}
-
-	if syntax != nil {
-		syn := 0
-
-		for i < len(data) && (data[i] == ' ' || data[i] == '\t') {
-			i++
-		}
-
-		syntax_start := i
-
-		if i < len(data) && data[i] == '{' {
-			i++
-			syntax_start++
-
-			for i < len(data) && data[i] != '}' && data[i] != '\n' {
-				syn++
-				i++
-			}
-
-			if i == len(data) || data[i] != '}' {
-				return 0
-			}
-
-			// string all whitespace at the beginning and the end
-			// of the {} block
-			for syn > 0 && isspace(data[syntax_start]) {
-				syntax_start++
-				syn--
-			}
-
-			for syn > 0 && isspace(data[syntax_start+syn-1]) {
-				syn--
-			}
-
-			i++
-		} else {
-			for i < len(data) && !isspace(data[i]) {
-				syn++
-				i++
-			}
-		}
-
-		language := string(data[syntax_start : syntax_start+syn])
-		*syntax = &language
-	}
-
-	for i < len(data) && data[i] != '\n' {
-		if !isspace(data[i]) {
-			return 0
-		}
-		i++
-	}
-
-	return i + 1
-}
-
-func blockFencedCode(out *bytes.Buffer, rndr *render, data []byte) int {
-	var lang *string
-	beg := isFencedCode(data, &lang)
-	if beg == 0 {
-		return 0
-	}
-
-	work := bytes.NewBuffer(nil)
-
-	for beg < len(data) {
-		fence_end := isFencedCode(data[beg:], nil)
-		if fence_end != 0 {
-			beg += fence_end
-			break
-		}
-
-		var end int
-		for end = beg + 1; end < len(data) && data[end-1] != '\n'; end++ {
-		}
-
-		if beg < end {
-			// verbatim copy to the working buffer, escaping entities
-			if isEmpty(data[beg:]) > 0 {
-				work.WriteByte('\n')
-			} else {
-				work.Write(data[beg:end])
-			}
-		}
-		beg = end
-	}
-
-	if work.Len() > 0 && work.Bytes()[work.Len()-1] != '\n' {
-		work.WriteByte('\n')
-	}
-
-	if rndr.mk.blockcode != nil {
-		syntax := ""
-		if lang != nil {
-			syntax = *lang
-		}
-
-		rndr.mk.blockcode(out, work.Bytes(), syntax, rndr.mk.opaque)
-	}
-
-	return beg
-}
-
-func blockTable(out *bytes.Buffer, rndr *render, data []byte) int {
-	header_work := bytes.NewBuffer(nil)
-	i, columns, col_data := blockTableHeader(header_work, rndr, data)
-	if i > 0 {
-		body_work := bytes.NewBuffer(nil)
-
-		for i < len(data) {
-			pipes, row_start := 0, i
-			for ; i < len(data) && data[i] != '\n'; i++ {
-				if data[i] == '|' {
-					pipes++
-				}
-			}
-
-			if pipes == 0 || i == len(data) {
-				i = row_start
-				break
-			}
-
-			blockTableRow(body_work, rndr, data[row_start:i], columns, col_data)
-			i++
-		}
-
-		if rndr.mk.table != nil {
-			rndr.mk.table(out, header_work.Bytes(), body_work.Bytes(), rndr.mk.opaque)
-		}
-	}
-
-	return i
-}
-
-func blockTableHeader(out *bytes.Buffer, rndr *render, data []byte) (size int, columns int, column_data []int) {
-	i, pipes := 0, 0
-	column_data = []int{}
-	for i = 0; i < len(data) && data[i] != '\n'; i++ {
-		if data[i] == '|' {
-			pipes++
-		}
-	}
-
-	if i == len(data) || pipes == 0 {
-		return 0, 0, column_data
-	}
-
-	header_end := i
-
-	if data[0] == '|' {
-		pipes--
-	}
-
-	if i > 2 && data[i-1] == '|' {
-		pipes--
-	}
-
-	columns = pipes + 1
-	column_data = make([]int, columns)
-
-	// parse the header underline
-	i++
-	if i < len(data) && data[i] == '|' {
-		i++
-	}
-
-	under_end := i
-	for under_end < len(data) && data[under_end] != '\n' {
-		under_end++
-	}
-
-	col := 0
-	for ; col < columns && i < under_end; col++ {
-		dashes := 0
-
-		for i < under_end && (data[i] == ' ' || data[i] == '\t') {
-			i++
-		}
-
-		if data[i] == ':' {
-			i++
-			column_data[col] |= TABLE_ALIGNMENT_LEFT
-			dashes++
-		}
-
-		for i < under_end && data[i] == '-' {
-			i++
-			dashes++
-		}
-
-		if i < under_end && data[i] == ':' {
-			i++
-			column_data[col] |= TABLE_ALIGNMENT_RIGHT
-			dashes++
-		}
-
-		for i < under_end && (data[i] == ' ' || data[i] == '\t') {
-			i++
-		}
-
-		if i < under_end && data[i] != '|' {
-			break
-		}
-
-		if dashes < 3 {
-			break
-		}
-
-		i++
-	}
-
-	if col < columns {
-		return 0, 0, column_data
-	}
-
-	blockTableRow(out, rndr, data[:header_end], columns, column_data)
-	size = under_end + 1
-	return
-}
-
-func blockTableRow(out *bytes.Buffer, rndr *render, data []byte, columns int, col_data []int) {
-	i, col := 0, 0
-	row_work := bytes.NewBuffer(nil)
-
-	if i < len(data) && data[i] == '|' {
-		i++
-	}
-
-	for col = 0; col < columns && i < len(data); col++ {
-		for i < len(data) && isspace(data[i]) {
-			i++
-		}
-
-		cell_start := i
-
-		for i < len(data) && data[i] != '|' {
-			i++
-		}
-
-		cell_end := i - 1
-
-		for cell_end > cell_start && isspace(data[cell_end]) {
-			cell_end--
-		}
-
-		cell_work := bytes.NewBuffer(nil)
-		parseInline(cell_work, rndr, data[cell_start:cell_end+1])
-
-		if rndr.mk.tableCell != nil {
-			cdata := 0
-			if col < len(col_data) {
-				cdata = col_data[col]
-			}
-			rndr.mk.tableCell(row_work, cell_work.Bytes(), cdata, rndr.mk.opaque)
-		}
-
-		i++
-	}
-
-	for ; col < columns; col++ {
-		empty_cell := []byte{}
-		if rndr.mk.tableCell != nil {
-			cdata := 0
-			if col < len(col_data) {
-				cdata = col_data[col]
-			}
-			rndr.mk.tableCell(row_work, empty_cell, cdata, rndr.mk.opaque)
-		}
-	}
-
-	if rndr.mk.tableRow != nil {
-		rndr.mk.tableRow(out, row_work.Bytes(), rndr.mk.opaque)
-	}
-}
-
-// returns blockquote prefix length
-func blockQuotePrefix(data []byte) int {
-	i := 0
-	for i < len(data) && i < 3 && data[i] == ' ' {
-		i++
-	}
-	if i < len(data) && data[i] == '>' {
-		if i+1 < len(data) && (data[i+1] == ' ' || data[i+1] == '\t') {
-			return i + 2
-		}
-		return i + 1
-	}
-	return 0
-}
-
-// parse a blockquote fragment
-func blockQuote(out *bytes.Buffer, rndr *render, data []byte) int {
-	block := bytes.NewBuffer(nil)
-	work := bytes.NewBuffer(nil)
-	beg, end := 0, 0
-	for beg < len(data) {
-		for end = beg + 1; end < len(data) && data[end-1] != '\n'; end++ {
-		}
-
-		if pre := blockQuotePrefix(data[beg:]); pre > 0 {
-			beg += pre // skip prefix
-		} else {
-			// empty line followed by non-quote line
-			if isEmpty(data[beg:]) > 0 && (end >= len(data) || (blockQuotePrefix(data[end:]) == 0 && isEmpty(data[end:]) == 0)) {
-				break
-			}
-		}
-
-		if beg < end { // copy into the in-place working buffer
-			work.Write(data[beg:end])
-		}
-		beg = end
-	}
-
-	parseBlock(block, rndr, work.Bytes())
-	if rndr.mk.blockquote != nil {
-		rndr.mk.blockquote(out, block.Bytes(), rndr.mk.opaque)
-	}
-	return end
-}
-
-// returns prefix length for block code
-func blockCodePrefix(data []byte) int {
-	if len(data) > 0 && data[0] == '\t' {
-		return 1
-	}
-	if len(data) > 3 && data[0] == ' ' && data[1] == ' ' && data[2] == ' ' && data[3] == ' ' {
-		return 4
-	}
-	return 0
-}
-
-func blockCode(out *bytes.Buffer, rndr *render, data []byte) int {
-	work := bytes.NewBuffer(nil)
-
-	beg, end := 0, 0
-	for beg < len(data) {
-		for end = beg + 1; end < len(data) && data[end-1] != '\n'; end++ {
-		}
-
-		if pre := blockCodePrefix(data[beg:end]); pre > 0 {
-			beg += pre
-		} else {
-			if isEmpty(data[beg:end]) == 0 {
-				// non-empty non-prefixed line breaks the pre
-				break
-			}
-		}
-
-		if beg < end {
-			// verbatim copy to the working buffer, escaping entities
-			if isEmpty(data[beg:end]) > 0 {
-				work.WriteByte('\n')
-			} else {
-				work.Write(data[beg:end])
-			}
-		}
-		beg = end
-	}
-
-	// trim all the \n off the end of work
-	workbytes := work.Bytes()
-	n := 0
-	for len(workbytes) > n && workbytes[len(workbytes)-n-1] == '\n' {
-		n++
-	}
-	if n > 0 {
-		work = bytes.NewBuffer(workbytes[:len(workbytes)-n])
-	}
-
-	work.WriteByte('\n')
-
-	if rndr.mk.blockcode != nil {
-		rndr.mk.blockcode(out, work.Bytes(), "", rndr.mk.opaque)
-	}
-
-	return beg
-}
-
-// returns unordered list item prefix
-func blockUliPrefix(data []byte) int {
-	i := 0
-	for i < len(data) && i < 3 && data[i] == ' ' {
-		i++
-	}
-	if i+1 >= len(data) || (data[i] != '*' && data[i] != '+' && data[i] != '-') || (data[i+1] != ' ' && data[i+1] != '\t') {
-		return 0
-	}
-	return i + 2
-}
-
-// returns ordered list item prefix
-func blockOliPrefix(data []byte) int {
-	i := 0
-	for i < len(data) && i < 3 && data[i] == ' ' {
-		i++
-	}
-	if i >= len(data) || data[i] < '0' || data[i] > '9' {
-		return 0
-	}
-	for i < len(data) && data[i] >= '0' && data[i] <= '9' {
-		i++
-	}
-	if i+1 >= len(data) || data[i] != '.' || (data[i+1] != ' ' && data[i+1] != '\t') {
-		return 0
-	}
-	return i + 2
-}
-
-// parse ordered or unordered list block
-func blockList(out *bytes.Buffer, rndr *render, data []byte, flags int) int {
-	work := bytes.NewBuffer(nil)
-
-	i, j := 0, 0
-	for i < len(data) {
-		j = blockListItem(work, rndr, data[i:], &flags)
-		i += j
-
-		if j == 0 || flags&LIST_ITEM_END_OF_LIST != 0 {
-			break
-		}
-	}
-
-	if rndr.mk.list != nil {
-		rndr.mk.list(out, work.Bytes(), flags, rndr.mk.opaque)
-	}
-	return i
-}
-
-// parse a single list item
-// assumes initial prefix is already removed
-func blockListItem(out *bytes.Buffer, rndr *render, data []byte, flags *int) int {
-	// keep track of the first indentation prefix
-	beg, end, pre, sublist, orgpre, i := 0, 0, 0, 0, 0, 0
-
-	for orgpre < 3 && orgpre < len(data) && data[orgpre] == ' ' {
-		orgpre++
-	}
-
-	beg = blockUliPrefix(data)
-	if beg == 0 {
-		beg = blockOliPrefix(data)
-	}
-	if beg == 0 {
-		return 0
-	}
-
-	// skip leading whitespace on first line
-	for beg < len(data) && data[beg] == ' ' {
-		beg++
-	}
-
-	// skip to the beginning of the following line
-	end = beg
-	for end < len(data) && data[end-1] != '\n' {
-		end++
-	}
-
-	// get working buffers
-	work := bytes.NewBuffer(nil)
-	inter := bytes.NewBuffer(nil)
-
-	// put the first line into the working buffer
-	work.Write(data[beg:end])
-	beg = end
-
-	// process the following lines
-	in_empty, has_inside_empty := false, false
-	for beg < len(data) {
-		end++
-
-		for end < len(data) && data[end-1] != '\n' {
-			end++
-		}
-
-		// process an empty line
-		if isEmpty(data[beg:end]) > 0 {
-			in_empty = true
-			beg = end
-			continue
-		}
-
-		// calculate the indentation
-		i = 0
-		for i < 4 && beg+i < end && data[beg+i] == ' ' {
-			i++
-		}
-
-		pre = i
-		if data[beg] == '\t' {
-			i = 1
-			pre = 8
-		}
-
-		// check for a new item
-		chunk := data[beg+i : end]
-		if (blockUliPrefix(chunk) > 0 && !isHrule(chunk)) || blockOliPrefix(chunk) > 0 {
-			if in_empty {
-				has_inside_empty = true
-			}
-
-			if pre == orgpre { // the following item must have the same indentation
-				break
-			}
-
-			if sublist == 0 {
-				sublist = work.Len()
-			}
-		} else {
-			// only join indented stuff after empty lines
-			if in_empty && i < 4 && data[beg] != '\t' {
-				*flags |= LIST_ITEM_END_OF_LIST
-				break
-			} else {
-				if in_empty {
-					work.WriteByte('\n')
-					has_inside_empty = true
-				}
-			}
-		}
-
-		in_empty = false
-
-		// add the line into the working buffer without prefix
-		work.Write(data[beg+i : end])
-		beg = end
-	}
-
-	// render li contents
-	if has_inside_empty {
-		*flags |= LIST_ITEM_CONTAINS_BLOCK
-	}
-
-	workbytes := work.Bytes()
-	if *flags&LIST_ITEM_CONTAINS_BLOCK != 0 {
-		// intermediate render of block li
-		if sublist > 0 && sublist < len(workbytes) {
-			parseBlock(inter, rndr, workbytes[:sublist])
-			parseBlock(inter, rndr, workbytes[sublist:])
-		} else {
-			parseBlock(inter, rndr, workbytes)
-		}
-	} else {
-		// intermediate render of inline li
-		if sublist > 0 && sublist < len(workbytes) {
-			parseInline(inter, rndr, workbytes[:sublist])
-			parseBlock(inter, rndr, workbytes[sublist:])
-		} else {
-			parseInline(inter, rndr, workbytes)
-		}
-	}
-
-	// render li itself
-	if rndr.mk.listitem != nil {
-		rndr.mk.listitem(out, inter.Bytes(), *flags, rndr.mk.opaque)
-	}
-
-	return beg
-}
-
-func blockParagraph(out *bytes.Buffer, rndr *render, data []byte) int {
-	i, end, level := 0, 0, 0
-
-	for i < len(data) {
-		for end = i + 1; end < len(data) && data[end-1] != '\n'; end++ {
-		}
-
-		if isEmpty(data[i:]) > 0 {
-			break
-		}
-		if level = isUnderlinedHeader(data[i:]); level > 0 {
-			break
-		}
-
-		if rndr.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
-			if data[i] == '<' && rndr.mk.blockhtml != nil && blockHtml(out, rndr, data[i:], false) > 0 {
-				end = i
-				break
-			}
-		}
-
-		if isPrefixHeader(rndr, data[i:]) || isHrule(data[i:]) {
-			end = i
-			break
-		}
-
-		i = end
-	}
-
-	work := data
-	size := i
-	for size > 0 && work[size-1] == '\n' {
-		size--
-	}
-
-	if level == 0 {
-		tmp := bytes.NewBuffer(nil)
-		parseInline(tmp, rndr, work[:size])
-		if rndr.mk.paragraph != nil {
-			rndr.mk.paragraph(out, tmp.Bytes(), rndr.mk.opaque)
-		}
-	} else {
-		if size > 0 {
-			beg := 0
-			i = size
-			size--
-
-			for size > 0 && work[size] != '\n' {
-				size--
-			}
-
-			beg = size + 1
-			for size > 0 && work[size-1] == '\n' {
-				size--
-			}
-
-			if size > 0 {
-				tmp := bytes.NewBuffer(nil)
-				parseInline(tmp, rndr, work[:size])
-				if rndr.mk.paragraph != nil {
-					rndr.mk.paragraph(out, tmp.Bytes(), rndr.mk.opaque)
-				}
-
-				work = work[beg:]
-				size = i - beg
-			} else {
-				size = i
-			}
-		}
-
-		header_work := bytes.NewBuffer(nil)
-		parseInline(header_work, rndr, work[:size])
-
-		if rndr.mk.header != nil {
-			rndr.mk.header(out, header_work.Bytes(), level, rndr.mk.opaque)
-		}
-	}
-
-	return end
-}
-
-
-//
 // Link references
 //
 // This section implements support for references that (usually) appear

@@ -16,12 +16,12 @@ import (
 	"bytes"
 )
 
-type smartypants_data struct {
-	in_squote bool
-	in_dquote bool
+type smartypantsData struct {
+	inSingleQuote bool
+	inDoubleQuote bool
 }
 
-func word_boundary(c byte) bool {
+func wordBoundary(c byte) bool {
 	return c == 0 || isspace(c) || ispunct(c)
 }
 
@@ -36,26 +36,26 @@ func isdigit(c byte) bool {
 	return c >= '0' && c <= '9'
 }
 
-func smartypants_quotes(ob *bytes.Buffer, previous_char byte, next_char byte, quote byte, is_open *bool) bool {
+func smartQuotesHelper(ob *bytes.Buffer, previousChar byte, nextChar byte, quote byte, isOpen *bool) bool {
 	switch {
 	// edge of the buffer is likely to be a tag that we don't get to see,
 	// so we assume there is text there
-	case word_boundary(previous_char) && previous_char != 0 && next_char == 0:
-		*is_open = true
-	case previous_char == 0 && word_boundary(next_char) && next_char != 0:
-		*is_open = false
-	case word_boundary(previous_char) && !word_boundary(next_char):
-		*is_open = true
-	case !word_boundary(previous_char) && word_boundary(next_char):
-		*is_open = false
-	case !word_boundary(previous_char) && !word_boundary(next_char):
-		*is_open = true
+	case wordBoundary(previousChar) && previousChar != 0 && nextChar == 0:
+		*isOpen = true
+	case previousChar == 0 && wordBoundary(nextChar) && nextChar != 0:
+		*isOpen = false
+	case wordBoundary(previousChar) && !wordBoundary(nextChar):
+		*isOpen = true
+	case !wordBoundary(previousChar) && wordBoundary(nextChar):
+		*isOpen = false
+	case !wordBoundary(previousChar) && !wordBoundary(nextChar):
+		*isOpen = true
 	default:
-		*is_open = !*is_open
+		*isOpen = !*isOpen
 	}
 
 	ob.WriteByte('&')
-	if *is_open {
+	if *isOpen {
 		ob.WriteByte('l')
 	} else {
 		ob.WriteByte('r')
@@ -65,21 +65,21 @@ ob.WriteString("quo;")
 	return true
 }
 
-func smartypants_cb__squote(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartSquote(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if len(text) >= 2 {
 		t1 := tolower(text[1])
 
 		if t1 == '\'' {
-			next_char := byte(0)
+			nextChar := byte(0)
 			if len(text) >= 3 {
-				next_char = text[2]
+				nextChar = text[2]
 			}
-			if smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
+			if smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
 				return 1
 			}
 		}
 
-		if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || word_boundary(text[2])) {
+		if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || wordBoundary(text[2])) {
 			ob.WriteString("&rsquo;")
 			return 0
 		}
@@ -87,18 +87,18 @@
 		if len(text) >= 3 {
 			t2 := tolower(text[2])
 
-			if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) && (len(text) < 4 || word_boundary(text[3])) {
+			if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) && (len(text) < 4 || wordBoundary(text[3])) {
 				ob.WriteString("&rsquo;")
 				return 0
 			}
 		}
 	}
 
-	next_char := byte(0)
+	nextChar := byte(0)
 	if len(text) > 1 {
-		next_char = text[1]
+		nextChar = text[1]
 	}
-	if smartypants_quotes(ob, previous_char, next_char, 's', &smrt.in_squote) {
+	if smartQuotesHelper(ob, previousChar, nextChar, 's', &smrt.inSingleQuote) {
 		return 0
 	}
 
@@ -106,7 +106,7 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__parens(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartParens(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if len(text) >= 3 {
 		t1 := tolower(text[1])
 		t2 := tolower(text[2])
@@ -131,14 +131,14 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__dash(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartDash(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if len(text) >= 2 {
 		if text[1] == '-' {
 			ob.WriteString("&mdash;")
 			return 1
 		}
 
-		if word_boundary(previous_char) && word_boundary(text[1]) {
+		if wordBoundary(previousChar) && wordBoundary(text[1]) {
 			ob.WriteString("&ndash;")
 			return 0
 		}
@@ -148,7 +148,7 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__dash_latex(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartDashLatex(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if len(text) >= 3 && text[1] == '-' && text[2] == '-' {
 		ob.WriteString("&mdash;")
 		return 2
@@ -162,13 +162,13 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__amp(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartAmp(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if bytes.HasPrefix(text, []byte("&quot;")) {
-		next_char := byte(0)
+		nextChar := byte(0)
 		if len(text) >= 7 {
-			next_char = text[6]
+			nextChar = text[6]
 		}
-		if smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
+		if smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
 			return 5
 		}
 	}
@@ -181,7 +181,7 @@ ob.WriteByte('&')
 	return 0
 }
 
-func smartypants_cb__period(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartPeriod(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if len(text) >= 3 && text[1] == '.' && text[2] == '.' {
 		ob.WriteString("&hellip;")
 		return 2
@@ -196,13 +196,13 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__backtick(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartBacktick(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	if len(text) >= 2 && text[1] == '`' {
-		next_char := byte(0)
+		nextChar := byte(0)
 		if len(text) >= 3 {
-			next_char = text[2]
+			nextChar = text[2]
 		}
-		if smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
+		if smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
 			return 1
 		}
 	}
@@ -210,8 +210,8 @@
 	return 0
 }
 
-func smartypants_cb__number_generic(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
-	if word_boundary(previous_char) && len(text) >= 3 {
+func smartNumberGeneric(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+	if wordBoundary(previousChar) && len(text) >= 3 {
 		// is it of the form digits/digits(word boundary)?, i.e., \d+/\d+\b
 		num_end := 0
 		for len(text) > num_end && isdigit(text[num_end]) {
@@ -233,7 +233,7 @@ if den_end == num_end+1 {
 			ob.WriteByte(text[0])
 			return 0
 		}
-		if len(text) == den_end || word_boundary(text[den_end]) {
+		if len(text) == den_end || wordBoundary(text[den_end]) {
 			ob.WriteString("<sup>")
 			ob.Write(text[:num_end])
 			ob.WriteString("</sup>&frasl;<sub>")
@@ -247,24 +247,24 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__number(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
-	if word_boundary(previous_char) && len(text) >= 3 {
+func smartNumber(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+	if wordBoundary(previousChar) && len(text) >= 3 {
 		if text[0] == '1' && text[1] == '/' && text[2] == '2' {
-			if len(text) < 4 || word_boundary(text[3]) {
+			if len(text) < 4 || wordBoundary(text[3]) {
 				ob.WriteString("&frac12;")
 				return 2
 			}
 		}
 
 		if text[0] == '1' && text[1] == '/' && text[2] == '4' {
-			if len(text) < 4 || word_boundary(text[3]) || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') {
+			if len(text) < 4 || wordBoundary(text[3]) || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') {
 				ob.WriteString("&frac14;")
 				return 2
 			}
 		}
 
 		if text[0] == '3' && text[1] == '/' && text[2] == '4' {
-			if len(text) < 4 || word_boundary(text[3]) || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') {
+			if len(text) < 4 || wordBoundary(text[3]) || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') {
 				ob.WriteString("&frac34;")
 				return 2
 			}
@@ -275,19 +275,19 @@ ob.WriteByte(text[0])
 	return 0
 }
 
-func smartypants_cb__dquote(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
-	next_char := byte(0)
+func smartDquote(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+	nextChar := byte(0)
 	if len(text) > 1 {
-		next_char = text[1]
+		nextChar = text[1]
 	}
-	if !smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
+	if !smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
 		ob.WriteString("&quot;")
 	}
 
 	return 0
 }
 
-func smartypants_cb__ltag(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
+func smartLtag(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
 	i := 0
 
 	for i < len(text) && text[i] != '>' {
@@ -298,42 +298,42 @@ ob.Write(text[:i+1])
 	return i
 }
 
-type smartypants_cb func(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int
+type smartCallback func(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int
 
-type SmartypantsRenderer [256]smartypants_cb
+type SmartypantsRenderer [256]smartCallback
 
 func Smartypants(flags int) *SmartypantsRenderer {
 	r := new(SmartypantsRenderer)
-	r['"'] = smartypants_cb__dquote
-	r['&'] = smartypants_cb__amp
-	r['\''] = smartypants_cb__squote
-	r['('] = smartypants_cb__parens
+	r['"'] = smartDquote
+	r['&'] = smartAmp
+	r['\''] = smartSquote
+	r['('] = smartParens
 	if flags&HTML_SMARTYPANTS_LATEX_DASHES == 0 {
-		r['-'] = smartypants_cb__dash
+		r['-'] = smartDash
 	} else {
-		r['-'] = smartypants_cb__dash_latex
+		r['-'] = smartDashLatex
 	}
-	r['.'] = smartypants_cb__period
+	r['.'] = smartPeriod
 	if flags&HTML_SMARTYPANTS_FRACTIONS == 0 {
-		r['1'] = smartypants_cb__number
-		r['3'] = smartypants_cb__number
+		r['1'] = smartNumber
+		r['3'] = smartNumber
 	} else {
 		for ch := '1'; ch <= '9'; ch++ {
-			r[ch] = smartypants_cb__number_generic
+			r[ch] = smartNumberGeneric
 		}
 	}
-	r['<'] = smartypants_cb__ltag
-	r['`'] = smartypants_cb__backtick
+	r['<'] = smartLtag
+	r['`'] = smartBacktick
 	return r
 }
 
-func rndr_smartypants(ob *bytes.Buffer, text []byte, opaque interface{}) {
+func htmlSmartypants(ob *bytes.Buffer, text []byte, opaque interface{}) {
 	options := opaque.(*htmlOptions)
-	smrt := smartypants_data{false, false}
+	smrt := smartypantsData{false, false}
 
 	// first do normal entity escaping
 	escaped := bytes.NewBuffer(nil)
-	attr_escape(escaped, text)
+	attrEscape(escaped, text)
 	text = escaped.Bytes()
 
 	mark := 0
@@ -343,11 +343,11 @@ if i > mark {
 				ob.Write(text[mark:i])
 			}
 
-			previous_char := byte(0)
+			previousChar := byte(0)
 			if i > 0 {
-				previous_char = text[i-1]
+				previousChar = text[i-1]
 			}
-			i += action(ob, &smrt, previous_char, text[i:])
+			i += action(ob, &smrt, previousChar, text[i:])
 			mark = i + 1
 		}
 	}